Clarion Conqueror (Showcase) [Tarkir: Dragonstorm] Zombie Elemental Set: Return to Ravnica Type:

Set: Return to Ravnica Type: Instant Rarity: Rare Cost: {1}{U} Return target nonland permanent you don't control to its owner's hand

they become poison counters

If a source you control with an odd mana value would deal damage to a permanent or player

or whatever extensive research you've done and can show that they're from that plane

then you may sacrifice a noncreature artifact

Clarion Conqueror (Showcase) [Tarkir: Dragonstorm] Zombie Elemental Set: Return to Ravnica Type:Set: Tarkir: Dragonstorm Type: Creature Rarity: Mythic Cost: {2}{W} Flying Activated abilities of artifacts, creatures, and planeswalkers can't be activated. The dragon's roar silenced all challengers, yet it was only an echo of Ugin's power.