Example
Arise X - As long as you control X or more permanent cards in your graveyard, {Effect}.
Example:
OR;
Rising X - As long as you control X or more permanent cards in your graveyard that where put there this turn, {Effect}
OR;
Arisen X {Cost} ({Cost}: Return this card from your graveyard to your battlefield. Activate only if there are X or more permanent cards in your graveyard.)
Bloodshed X {COST} ({COST}: {CARDNAME} deals X damage to target creature or player that was dealt damage by it this turn)
Revoke X {COST} ({COST}: {CARDNAME} deals X damage to target creature or player that dealt damage to it this turn)
Remembrance with {CARDNAME} X (Gets +X/+X and has {Ability} as long as {CARDNAME} is in your graveyard)
Knighthood {Cost} ({Cost}: Put a vigilance counter on target creature you control)
Warfare X {Cost} (You may pay {Cost} as it attacks. If you do, creatures you control get +X/+X and gain haste until end of turn.)
Firestarter X {cost} (You may cast this spell for it's firestarter cost. if you do, copy it X times. You may choose new targets.)
Clashed X {Cost} (Whenever this creature is blocked, you may pay it's clash cost any number of times. It gets +1/+1 each time you payed the clash cost.)
Conjured creature (a conjured creature has haste and is sacrificed at the beginning of the next end step)
Conjure {Cost} (If you cast this for it's conjured cost, it gains haste and is sacrificed at the beginning of the next end step, unless you pay it's mana cost before then.)
Firestart {Cost} (As you cast this spell, you may pay it's firestart cost. If you do, you may search your library for a card with the same name as this card, and cast it without paying it's mana cost. Exile it after it resolves.)
Gravebind {Cost} (You may exile this card from your hand for {2}. You may cast it at anytime from exile for it's gravebind cost, then put it in your graveyard.)
Invade {Cost} (When blocked, you may invade defending creature. (To invade, exile this creature, then return it to the battlefield tapped and attacking at the beginning if your next declare attackers step. It can't be blocked that turn.))
Magnum X {Cost} (You may cast this card for {Cost} if an creature dealt damage to you this turn. If you do create X 1/1 red artifact creature tokens with "Sacrifice this creature: It deals 1 damage to target creature)
Rewriten {Cost} (You may cast this card from your graveyard. Replace all instances of "target" with "each". Then exile it.)
Cellular {Cost} ({Cost}: Reveal this card from your hand).
Always followed by an effect:
Rogue N (When this permanent enters the battlefield, reveal the top card of your library. If the converted mana cost is N or more, target opponent takes control of it.)
Ambush (Cast this spell only during an opponents combat phase.)
Command N (Reveal the top N cards of your library. Put a creature card from among them into your hand and the rest at the bottom of your library in any order.)
Endure N {Cost} ({Cost}{T}: If this creature isn't enduring, put N +1/+1 counters on it. Enduring creatures you control have vigilance. (A creature is enduring as long as it has three or more +1/+1 counters on it.))
Enlight N (Put N +1/+1 counters on target untapped creature you control with converted mana cost less than this spells converted mana cost.)
Unhallowed N (When this creature enters the battlefield, you may exile the top 4 cards of your library, 4 cards from your hand, graveyard, or 4 cards in the battlefield you control. If you do, put N +1/+1 counters on this creature. You may cast cards exiled by this creature, then put them into your graveyard.)
Arise X - As long as you control X or more permanent cards in your graveyard, {Effect}.
Example:
OR;
Rising X - As long as you control X or more permanent cards in your graveyard that where put there this turn, {Effect}
OR;
Arisen X {Cost} ({Cost}: Return this card from your graveyard to your battlefield. Activate only if there are X or more permanent cards in your graveyard.)
Bloodshed X {COST} ({COST}: {CARDNAME} deals X damage to target creature or player that was dealt damage by it this turn)
Revoke X {COST} ({COST}: {CARDNAME} deals X damage to target creature or player that dealt damage to it this turn)
Remembrance with {CARDNAME} X (Gets +X/+X and has {Ability} as long as {CARDNAME} is in your graveyard)
Knighthood {Cost} ({Cost}: Put a vigilance counter on target creature you control)
Warfare X {Cost} (You may pay {Cost} as it attacks. If you do, creatures you control get +X/+X and gain haste until end of turn.)
Firestarter X {cost} (You may cast this spell for it's firestarter cost. if you do, copy it X times. You may choose new targets.)
Clashed X {Cost} (Whenever this creature is blocked, you may pay it's clash cost any number of times. It gets +1/+1 each time you payed the clash cost.)
Conjured creature (a conjured creature has haste and is sacrificed at the beginning of the next end step)
Conjure {Cost} (If you cast this for it's conjured cost, it gains haste and is sacrificed at the beginning of the next end step, unless you pay it's mana cost before then.)
Firestart {Cost} (As you cast this spell, you may pay it's firestart cost. If you do, you may search your library for a card with the same name as this card, and cast it without paying it's mana cost. Exile it after it resolves.)
Gravebind {Cost} (You may exile this card from your hand for {2}. You may cast it at anytime from exile for it's gravebind cost, then put it in your graveyard.)
Invade {Cost} (When blocked, you may invade defending creature. (To invade, exile this creature, then return it to the battlefield tapped and attacking at the beginning if your next declare attackers step. It can't be blocked that turn.))
Magnum X {Cost} (You may cast this card for {Cost} if an creature dealt damage to you this turn. If you do create X 1/1 red artifact creature tokens with "Sacrifice this creature: It deals 1 damage to target creature)
Rewriten {Cost} (You may cast this card from your graveyard. Replace all instances of "target" with "each". Then exile it.)
Cellular {Cost} ({Cost}: Reveal this card from your hand).
Always followed by an effect:
Rogue N (When this permanent enters the battlefield, reveal the top card of your library. If the converted mana cost is N or more, target opponent takes control of it.)
Ambush (Cast this spell only during an opponents combat phase.)
Command N (Reveal the top N cards of your library. Put a creature card from among them into your hand and the rest at the bottom of your library in any order.)
Endure N {Cost} ({Cost}{T}: If this creature isn't enduring, put N +1/+1 counters on it. Enduring creatures you control have vigilance. (A creature is enduring as long as it has three or more +1/+1 counters on it.))
Enlight N (Put N +1/+1 counters on target untapped creature you control with converted mana cost less than this spells converted mana cost.)
Unhallowed N (When this creature enters the battlefield, you may exile the top 4 cards of your library, 4 cards from your hand, graveyard, or 4 cards in the battlefield you control. If you do, put N +1/+1 counters on this creature. You may cast cards exiled by this creature, then put them into your graveyard.)
Spiritlink (Whenever this creature deals combat damage to a player, create a number of 1/1 black and white spirit creature tokens with flying equal to half the number of damage dealt rounded up.)
Psychiclink (Whenever this creature deals combat damage to a creature, that creature's controller exiles top cards of their library equal to the amount of damage dealt)
Shun N {Cost} (You may cast this card from your graveyard by exiling the top N cards of your library in addition to paying the shun cost.)
Exuberance N {Cost} (Whenever this creature deals combat damage to a player, you may pay {Cost}. If you do, draw N cards)
Endorse N (This creature enters the battlefield with N +1/+1 counters for each other creature you control with the same name as it.)
Shun N {Cost} (You may cast this card from your graveyard by exiling the top N cards of your library in addition to paying the shun cost.)
Exuberance N {Cost} (Whenever this creature deals combat damage to a player, you may pay {Cost}. If you do, draw N cards)
Endorse N (This creature enters the battlefield with N +1/+1 counters for each other creature you control with the same name as it.)
Comments
Bombard N (Whenever a creature you control deals combat damage to a player, instead you may prevent that damage and discard N cards. If you do, you may reveal this card from your hand and then cast a copy of it without paying it's mana cost.)
Spirituality N {Cost} (Whenever you would draw a card, instead you may pay {Cost} and exile this creature from your graveyard. If you do, create a N/N black and white spirit creature token with flying.)
Soulsound N (When this creature would die, exile it instead, then you may return a spirit card with converted mana cost N or less from your graveyard to the battlefield.)
Rubble - If you control 4 or more creatures, {effect}.
_____OR;_____
Rubble - {Effect}, as long as you control 4 or more creatures.
Incubate N {Cost} (You may cast this card as a face-down 0/3 creature for {2}. Turn it face-up and put N +1/+1 counters on it anytime for it's incubate cost.)
Roil N {Cost} (Whenever you would discard a card, you may pay {Cost}. If you do exile this card from your graveyard with N roil counters on it. You may pay {2} anytime to remove one roil counter from it. When the last is removed, you may cast it without paying it's mana cost. it gains haste.)
Revive N (Shuffle N cards from your graveyard or exile, into your library.)
Messenger (Whenever it deals combat damage to a player, you may cast a card from your hand that costs less without paying it's mana cost.)
Sturdy (Assign combat damage equal to it's toughness rather than it's power.)
Ravenous - {Cost}, Sacrifice another non-token creature: {Effect}.
Relay (You may cast this card from your graveyard anytime you could cast a sorcery.)
Scourge (When this creature enters the battlefield, it deals damage equal to it's power to target player or planeswalker.)
Armor up N (Put N +1/+1 counters on target creature you control with the greatest power.)
Angelication - If you have 20 or more life, {Effect}.
OR;
Angelication - {Effect} as long as you have 20 or more life.
Tangle X (When this creature attacks tap X target non-flying creatures that defending player controls.)
Profess (When you cast a spell this creature gets +1/+1 until end of turn.)
Burrows (This creature can't be blocked by flying creature and/or creatures that share it's colors.)
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Similar to tribute.
In debt seems a little strange, but fluxuate is really awesome!It could def be an Izzet mechanic.
Psychic-link (Whenever this creature would deal combat damage to a player, it doesn't. Instead that player puts that many cards from their library into their graveyard.)
Meld-melt (Whenever this creature would deal combat damage to a player, it doesn't. Instead, exile that many cards on the top of their library.)
Very, very similar.
I'd also like to point out that so many of these don't need to be keyworded. They're just too niche.
Also the word you're looking for is "Endorsed".