Eldirun, Winter-Thaw Magi

All permanents you cast are Snow permanents
in addition to their other types. When you cast
a Snow spell you may place an Ice Counter on
target permanent and tap it. Permanents
with Ice Counters on them cannot attack,
block or activate abilities other than Thaw.
({t}: Thaw an Ice Counter on this permanent.)
"A Blizzard in the middle of Summer? I think it is
fair to say that we are close."