Cozmyc's Scythe

When equipped by a specter that creature gets
+3/+3 and if a player discards a card all opponents
also discard a card.
When equipped by non-specter creature it get -2/-2.
Cozmyc's Scythe must be equipped to a creature on the battlefield.
When equipped creature dies you may choose any creature to attach Cozmyc's Scythe to.
If there is no creature for Cozmyc's Scythe to
attach to then it returns to the sideboard.