The One that Broke Free

+1: Create a token that is a copy of target creature except its a sliver with power and toughness 1/1
-2: Sacrifice a sliver, target creature gains your choice of lifelink, deathtouch, haste, trample, or flying until end of turn.
-10: sacrifice all slivers you control, create a sliver creature token with power and toughness x/x where x is the number of slivers sacrificed.