Senna, the Redeemer

Lifelink
Whenever a nontoken creature an opponent
controls dies, put a +1/+0 counter on Senna, the
Redeemer.
Whenever a creature token an opponent controls
dies, flip a coin. If you win the flip, put a +1/+0
counter on Senna, the Redeemer.
By the time I'm done here, dying will be the easy part.