Plunge Into the Icy Depths

Enchant nonland permanent an opponent
controls.
Gain control of enchanted permanent.
Enchanted permanent has, Cumulative
Upkeep {s} (At the beginning of your upkeep, put an
age counter on this permanent, then sacrifice it unless
you pay it's upkeep cost for each age counter on it.
{s} can be paid with one mana from a snow
permanent)