Kaphiri, Breaker of Chains

First Strike
Whenever you cast an instant spell during your
main phase, tap target creature and opponent controls and put a +1/+1 counter on Kaphiri.
Whenever Kaphiri deals combat damage to a
player you may remove a +1/+1 counter from
her, if you do add {1} to your mana pool at the
beginning of your next main phase this turn.