Harsh Leaf-bare

{s}{s}{b}{b}{b}:All creatures get -1/-1. On the
beginning of each upkeep, each creature you do
not control gets a frost counter. When a creature
gets to 8 frost counters, it dies. At the beginning
of each upkeep, any player can pay {1} to remove
a frost counter from a creature. You may only activate this ability once.
"The Clan is starving! This leaf-bare is too harsh.
There is no prey and we are all going to die!"
-Goosefeather