Sumala Rumblers is a uncommon Creature — Wurm card from Ravnica: Clue Edition (CLU), collector number 45. Current market price: $0.29, TCGplayer market prices via Scryfall.
Sumala Rumblers's power is equal to the number of creatures you control. Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)