Scion of Opulence

Menace

Whenever one or more creatures you control deal combat damage to a player, create a Treasure token.

Sacrifice a Treasure: Exile the top card of your library. You may play that card this turn.

Whenever an artifact you control enters, this creature deals 1 damage to target opponent.

, Sacrifice two artifacts: Exile the top card of your library. You may play that card this turn.

Flying

Gadrak can't attack unless you control four or more artifacts.

At the beginning of your end step, create a Treasure token for each nontoken creature that died this turn. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Whenever you sacrifice a nontoken permanent, exile the top card of your library.

During your turn, as long as you've sacrificed a nontoken permanent this turn, you may play cards exiled with this creature.

, Sacrifice a land: Add .

When this creature enters, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Whenever you attack, you may sacrifice one or more Treasures. When you do, up to that many target creatures gain double strike until end of turn.

Trample, Haste

Whenever a creature you control deals combat damage to a player, exile the top card of that player's library. It perpetually becomes an artifact if it's a nonland permanent card. Until end of turn, you may play the exiled card.

, Sacrifice an artifact: Add three mana of any one color.