Darth Sion, Hate-Bound

Darth Sion, Hate-Bound gets +1/+1 for each experience counter you have

Undying Hatred - Whenever Darth Sion, Hate-Bound dies, you get an experience counter, then you may pay 2 life. If you do, return it to the battlefield.

Once you have 10 or more experience counters, Darth Sion, Hate-Bound deals damage equal to its power to each other creature and opponent.