Command Tower

{T}: Add one mana of any color in your commander's color identity.

Izzet Signet

Arcane Signet

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Sol Ring

Illuna, Apex of Wishes

Mutate {3}{R/G}{U}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Flying, trample
Whenever this creature mutates, exile cards from the top of your library until you exile a nonland permanent card. Put that card onto the battlefield or into your hand.