Omega, Heartless Evolution is a uncommon Legendary Artifact Creature — Robot card from Final Fantasy (FIN), collector number 347. Current market price: $0.38 (foil $0.41), TCGplayer market prices via Scryfall.
Wave Cannon — When Omega enters, for each opponent, tap up to one target nonland permanent that opponent controls. Put X stun counters on each of those permanents and you gain X life, where X is the number of nonbasic lands you control. (If a permanent with a stun counter would become untapped, remove one from it instead.)