So with the new guilds of Ravnica set, the mechanics have now been released, checkhttps://magic.wizards.com/en/articles/archive/feature/guilds-ravnica-mechanics-2018-09-04
. You can make one card for each guild plus two more.
.The card must have the watermark of the guild in which it occupies.
. The card must use the new mechanic of that guild.
.You may use hybrid Mana and split cards which can count for your extra 2 cards.
.Judging date and prizes are yet to be decided.
. Cards not made on mtgcardsmith are allowed.
. Try to use valid text and wording as well as spacing and try not to make your cards too over powered.
Good luck and happy smithing!