Undying, the undying

As Undying the undying enters the battlefield search your library for 2 or less auras and attach them to Undying the undying. Indistructable, hexproof, and first strike.When Undying the undying takes damage put a -1/-1 counter on undying the undying. If Undying the undying has 6 or more -1/-1 counters on them sacrifice Undying the undying.