Sion, the Undead Juggernaut

Tank, Trample, Menace

If Sion dies during your first combat phase, there's
an additional combat phase followed by an additional main phase.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
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"Rest is for the living."