Vona, Culler of Sinners

Vona, Culler of Sinners costs {1} less to cast for
each 1 life you gained this turn.
First strike, lifelink
Pay 5 life: Put three +1/+1 counters on Vona.
Activate this ability only on your turn and only
once each turn.
She drank greedily, and felt the sinner's blood fill her
with righteous purpose.