the quintessential quintuplets specials premium booster box Weiss Schwarz - THE QUINTESSENTIAL

Apart from mutate cards to trigger that ability, I guess you could use Stuffy Doll and Brash Taunter, or fill your deck with cards that grant abilities to your commander like backgrounds and the legendary familiars (Kediss, Falthis, et al)

Yawgmoth, Thran Physician [Sacrifice Engine, Removal & Card Draw] Yawgmoth, Thran Physician turns creatures into cards, removal, and combo fuel

Salvage is a key component of the deck, almost always played in numbers of two or three

Its not an elf, but theres also a powerful combo with Sage of Hours that finishes out a game easily if youve got enough experience counters

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UR Ultra Rare UL Ultimate Rare Splash Capture X TRAP When your opponent Xyz Summons: Banish 2 Fish-Type monsters from your Graveyard to target that face-up Xyz Monster