Name:Apocalypse Demon
ManaCost:4 B B
Types:Creature Demon
PT:*/*
K:Flying
S:Mode$ Continuous | EffectZone$ All | CharacteristicDefining$ True | SetPower$ X | SetToughness$ X | Description$ CARDNAME's power and toughness are each equal to the number of cards in your graveyard.
T:Mode$ Phase | Phase$ Upkeep | ValidPlayer$ You | TriggerZones$ Battlefield | Execute$ TrigTap | TriggerDescription$ At the beginning of your upkeep, tap CARDNAME unless you sacrifice another creature.
SVar:TrigTap:DB$ Tap | UnlessCost$ Sac<1/Creature.Other/another creature> | UnlessPayer$ You | Defined$ Self 
SVar:X:Count$InYourYard
SVar:Picture:http://www.wizards.com/global/images/magic/general/apocalypse_demon.jpg
Oracle:Flying\nApocalypse Demon's power and toughness are each equal to the number of cards in your graveyard.\nAt the beginning of your upkeep, tap Apocalypse Demon unless you sacrifice another creature.