Karigon, Paladin of Ice

Karigon, Paladin of Ice and other snow permanent spells you cast cost {1} less to cast for each tapped nonland permanent you control.
Nonland, nonsnow permanents you control don't untap during your next untap step.
{s}{s}, Sacrifice an untapped snow permanent: Untap each nonland permanent you control.

"In winter, we outlast."