Ezra, Obsessive Chronomancer

When Ezra enters and whenever you cast a historic spell, choose one:
• Draw 2 Cards
• Put a Time Counter on Ezra

Remove X Time Counters from Ezra: Choose target creature an opponent controls. That creature and Ezra can only attack each other and cannot be the targets of any spells or abilities for X turns.

Ezra's Power is equal to the number of Time Counters on him.