Alyn the Sorceres

Flying, Haste
When Alyn the Sorceress kills a creature,
she gains a counter
{b}{g},{t} Spend a counter, all creatures under your
control gain +3/+3 until end of turn
{b},{t} Spend a counter, Target
Creature gains +1/+0
{g},{t} Spend a counter, Target
Creature gains +0/+1