Custom Card Set - Biulta

Hello,
This is my first custom card set: Biulta. It is a plane where the ten kingdoms vie for dominance over the plane. Recently, however, the two color mana lines that have originally been side by side, have begun to split apart. None of the kingdoms seem to notice, too interested in their own gain. Planeswalkers from across the Multiverse have noticed this shift, and they decided to send a Planeswalker to each kingdom, to warn them of what is coming to Biulta....
All cards for this set will be posted under a different account of mine which will be coming soon. So what do you think Of Biulta and what do you think is going to happen to Biulta? And now for the profile of each of the kingdoms.
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W/U Kingdom - The Skylon
Leader - Janess
Champion - Aerion
Tribe 1 - Sphinxes
Tribe 2 - Birds
Playstyle - Flying
Mechanic - Forecast
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U/B Kingdom - The Gravox
Leader - Necroax
Champion - Dreaette
Tribe 1 - Zombies
Tribe 2 - Faeries
Playstyle - Graveyard
Mechanic - Delve
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B/R Kingdom - The Culdos
Leader - Asherok
Champion - Blood-Claw
Tribe 1 - Demons
Tribe 2 - Goblins
Playstyle - Quick Hitters
Mechanic - Unleash
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R/G Kingdom - The Savek
Leader - Ninran
Champion - Panos
Tribe 1 - Hydras
Tribe 2 - Satyrs
Playstyle - Mana Ramp
Mechanic - Monstrosity
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G/W Kingdom - The Natin
Leader - Natin
Champion - Felin
Tribe 1 - Dryads
Tribe 2 - Cats
Playstyle - Tokens
Mechanic - Populate
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W/B Kingdom - The Vitae
Leader - Spirion
Champion - Jolan
Tribe 1 - Spirits
Tribe 2 - Clerics
Playstyle - Lifegain
Mechanic - Extort
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U/R Kingdom - The Storink
Leader - Pyroua
Champion - Wishant
Tribe 1 - Dragons
Tribe 2 - Djinns
Playstyle - Spells
Mechanic - Overload
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B/G Kingdom - The Plaed
Leader - Gralev
Champion - Treont
Tribe 1 - Elves
Tribe 2 - Treefolk
Playstyle - Sacrifice
Mechanic - Scavenge
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R/W Kingdom - The Sunar
Leader - Solice
Champion - Thelies
Tribe 1 - Angels
Tribe 2 - Soldiers
Playstyle - Attacking
Mechanic - Battalion
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G/U Mechanic - The Marean
Leader - Trolin
Champion - Scitant
Tribe 1 - Merfolk
Tribe 2 - Mutants
Playstyle - +1/+1 counters
Mechanic Evolve
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Wow, that was long! I'll bring more information soon such as Planeswalkers, Cards, and of course the link to the set. Thank you all for reading and you can give me ideas for designing the set.
Simicguy