Classes: Any except Warlock (because it has no class cards that say 'shuffle')
Restrictions: There are 6 non legendary minions that say "shuffle" - use at least 10 of these in total, and at least one of the legendaries (Elise, Elise 2.0, The Darkness, and Hakkar). Whatever class you pick, you have to use all the cards in that class that say "shuffle". Anything else goes.
Banned cards: Kingsbane, Jade Idol
edit: Updated the requirement to a minimum of 10 of the cards, in case you don't want to craft that second copy of an epic card.
^ ha! Yeah glad you didn't go craft crazy. I had to craft one beneath the grounds but that game was so worth it. :D
Name: Knights & Squires Format: Any (but it's a bigger minion pool in wild... barely hit 12 in standard) Classes: Any Restrictions: You may only use minions with Knight or Squire in their name. 12 minion minimum.
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Minions, servants, soldiers of the cold dark, obey the call of Kel'Thuzad!
Name: Custom Expansion Format: Any, but Wild suggested Classes: Any Restrictions: Choose 4 expansions/adventures. You may only use common cards from one, rare cards from the second, epic cards from the third, and Legendaries from the fourth. You must use at least one card from each expansion. Basic and Classic cards are not allowed.
To clarify, as an example, you might choose to use commons from Goblins vs Gnomes, Rares from Journey to Un'goro, Epics from Kobolds and Catacombs, and Legendaries from Whispers of the Old Gods.