Araumi of the Dead Tide is a uncommon Legendary Creature — Merfolk Wizard card from Commander Legends (CMR), collector number 267. Current market price: $0.28 (foil $0.39), TCGplayer market prices via Scryfall.
{T}, Exile cards from your graveyard equal to the number of opponents you have: Target creature card in your graveyard gains encore until end of turn. The encore cost is equal to its mana cost. (Exile the creature card and pay its mana cost: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)