Icefire, the Frozen Blaze

Equip {u/b}{u/b}
Equipped creature has base power of 0 and gains
Skulk. Whenever equipped creature attacks and
is not blocked, it gets +7/+7 until end of turn.
Backstab - Whenever equipped creature deals
combat damage to a player, you may remove a
coin counter. If you do, target creature gets -5/-5
until end of turn.