Frostburn

Deal 2 damage to target creature or player.
Frostburn (Tap any creature dealt damage by this. If that creature is nonsnow, put a frost counter on it. Nonsnow creatures with frost counters on them get -1/-1 and don't untap during their controllers untap step. At the beginning of each player's upkeep, that player removes all frost counters from permanents they control.)