Valgars Eldrazi Swarm

for each x payed for with {c} you may search
your library for an Eldrazi card, you may put
this card onto the battlefield as if you had cast
it by paying its mana cost, without paying its manacost
if one of these cards is named Valgar you may create 3 0/1 colorless Eldrazi spawn creature tokens with "{t}, exile this creature, add {c}