Omarthis, Ghostfire Initiate [Commander Masters] Commander 2019 sacrifice Contamination unless you sacrifice

sacrifice Contamination unless you sacrifice a creature

In the arena

Set: Core Set 2021 Promos Type: Instant Rarity: Rare Cost: {1}{G} Permanents you control gain hexproof and indestructible until end of turn

If you time your weapons correctly

Dethrone (Whenever this creature attacks the player with the most life or tied for the most life

Omarthis, Ghostfire Initiate [Commander Masters] Commander 2019 sacrifice Contamination unless you sacrificeSet: Commander Masters Type: Legendary Creature Spirit Naga Rarity: Mythic Cost: {X}{X} Omarthis, Ghostfire Initiate enters the battlefield with X +1 +1 counters on it. Whenever you put one or more +1 +1 counters on another colorless creature, you may put a +1 +1 counter on Omarthis. When Omarthis dies, manifest a number of cards from the top of your library equal to the number of counters on it.