Omarthis, Ghostfire Initiate [Commander Masters] H26 Xenagos isn't a creature

Xenagos isn't a creature

I've never seen it before in my life

Set: EX: Dragon Frontiers Type: Metal Rarity: Uncommon Retreat cost: Colorless

Set: The List Type: Legendary Creature — Human Wizard Rarity: Rare Cost: {2}{U}{U} Flash

where X is the number of Gremlins you control

Omarthis, Ghostfire Initiate [Commander Masters] H26 Xenagos isn't a creatureSet: 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.