Soul of Cinder

This creature enters with X kindling tokens on
it. Any time Soul of Cinder would deal damage to
a planeswalker or player, add that many kindling tokens to Soul of Cinder.
Soul of Cinder's power is equal to the number of kindling tokens on it.
{t}{r}{r}: Deal damage equal to Soul of Cinder's power to target creature. Soul of Cinder will not untap during its controller's next untap step.