Larius, the Soul Star Dragon

Whenever you cast a non creature spell, put a
Soul Star counter on Larius
{t}, Remove {x} Soul Star counters from this card, distribute X +1/+1 counters among creatures you control until end of turn
Whenever a Soul Star Counter is removed from Larius, target creature with total power X cannot
block this turn where X is equal to the number
of Soul Star counters removed this turn