Tira the Cleric

When Tira the Cleric enters the battlefield, place a +0/+1 counter on all creatures you control.
{t}{p/w}Place a +0/+X counter on target creature you control.
{t}{x}Gain X/2 health.
When Tira the Cleric is defeated place a +0/+1 counter on all creaturesyou control.