deck yu gi oh jaden Complete Custom for Yu-Gi-Oh! GX YuGiOh GX! Complete Jaden Yuki

With this cards ability, spells you cast either return to your hand without resolving, or get copied

Equip Artifact - Equipment Hulking Metamorph Prototype 3/3 (You may cast this spell with different mana cost, color, and size

Key Cards for Kimahri: Edge of Eternities #1 EDHREC: Hearthhull, the WorldseedHearthhull, the Worldseed Precon legends continue their dominance into Edge of Eternities with Hearthhull, the WorldseedHearthhull, the Worldseed, a legendary Spacecraft that's a legal commander due to a rule change allowing them

Most judges would probably disallow this though, since the mana-adding is no longer being done in the most efficient way, and this starts to run afoul of the intention behind the "players may not make irrelevant changes between iterations" line