Name:Soulshriek
ManaCost:B
Types:Instant
A:SP$ Pump | Cost$ B | ValidTgts$ Creature.YouCtrl | TgtPrompt$ Select target creature you control | NumAtt$ X | References$ X | AtEOT$ Sacrifice | SpellDescription$ Target creature you control gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard. Sacrifice that creature at the beginning of the next end step.
SVar:X:Count$TypeInYourYard.Creature
SVar:RemAIDeck:True
SVar:Picture:http://www.wizards.com/global/images/magic/general/soulshriek.jpg
Oracle:Target creature you control gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard. Sacrifice that creature at the beginning of the next end step.