Kanzani, the Worshiped

Kanzani, the Worshiped can not attack or block
unless their are a total 10 conversion counters on creatures.
{u}{g}{t}: Put a conversion counter on target
creature.
{x}{b}{b}{t}: return target creature with mana cost
x or less from your graveyard to the battlefield,
put a conversion counter on it.
"We are but your humble servants." ~ Ajaar