ElVersa Doreins

Reach
When ElVersa Doreins enters, it deals X damage to target creature, where X is twice its power.

{u},{t}: Roll a d20. On a 11-20, ElVersa Doreins phases out until end of turn.

{1}{u}{u}: Exile ElVersa Doreins then return it to the battlefield under its owner's control. Do this only once each turn.