Greatsword Frostshatter

Equipped creature gets +4/+4.
Whenever equipped creature deals combat
damage to a creature, put a frost counter at
the creature dealt damage this way.
Creatures with frost counters can't attack.
Equip {5} ({5}: Attach to target creature you
control. Equip only as a sorcery.)
Ages passed by and Frostshatter was forgotten.
But recently, the dwarfs of Drom, brought it back
from the depth of the world.