That Which Was Compleated is a uncommon Artifact Creature — Eldrazi Phyrexian Processor card from Unknown Event (UNK), collector number UA01b. Current market price: $39.99, TCGplayer market prices via Scryfall.
Ward—You get two poison counters. Annihilator X, where X is the total number of poison counters your opponents have. When you cast That Which Was Compleated, you may put a card an opponent owns in exile into their graveyard. If you do, they get two poison counters.