Iusticia

Whenever an opponent casts a spell, put a +1/+1 counter on Iusticia and you gain life equal to the number of +1/+1 counters on Iusticia.
Spells your opponents cast cost {1} more to cast
for each +1/+1 counter on Iusticia.
"Peace is all we have ever wanted. It is the greatest
tragedy that we can only obtain it by force."
-Terriah, Warden of Hod Lamedh