Frostspine Quillback

Trample, Frostbite(This creature deals combat damage to creatures in frost counters)
When a creature gets a frost counter, tap that creature, it doesn't untap for as long as there is a frost counter on it. Those creatures get -X/-X for each frost counter on them until end of turn.
At the beginning of your upkeep, remove a frost counter from each creature that has a frost counter on it.