Omegon, Alpha Legion

Double strike, Hexproof, Trample

Hydra Lives—Whenever Alpharius dies or goes to exile you may sacrifice Omegon and return Alpharius to the battlefield.

Sleeper Agents—At the beginning of each player end step that players creates a 2/2 colorless Astartes creature.
And then you may switch control of two target Astartes creatures

Partner with Alpharius