Cyberdemon

Undying 2, Trample, Vigilance.
When Undying successfully activates the current Player's turn immediately ends, and the owner of Cyberdemon resumes the game at the start of their turn.
The symbiotic union of a Baalgar Demon and an Argent Accumulator. When exhausted, it simply replenishes its life force from it's Accumulator and attacks again with greater ferocity.