Gangrenous Ice Ceremonial

As an additional cost to cast Gangrenous Ice Ceremonial, sacrifice X nonsnow permanents.
Gangrenous Ice Ceremonial enters the battlefield
with X storage counters on it.
Remove a storage counter from Gangrenous Ice
Ceremonial: You can play target snow card in
your graveyard until end of turn. It has affinity
for snow (This spell costs {1} less to cast for each snow
permanent you control.)