Benji, Gyre Clade Beast

Flash
Whenever you cast an instant or sorcery spell, put a +1/+1 counter on Benji, Gyre Clade Beast.
Whenever one or more +1/+1 counters are placed on Benji, draw a card.
{u}{u}, Remove X counters from a creature you control: Counter target spell unless its controller pays {x}.