Name:Devouring Hellion
ManaCost:2 R
Types:Creature Hellion
PT:2/2
R:Event$ Moved | ValidCard$ Card.Self | Destination$ Battlefield | ReplaceWith$ DevourCreatsAndWalkers | Description$ As CARDNAME enters the battlefield, you may sacrifice any number of creatures and/or planeswalkers. If you do, it enters with twice that many +1/+1 counters on it.
SVar:DevourCreatsAndWalkers:DB$ Sacrifice | Defined$ You | Amount$ DevourSacX | SacValid$ Creature.Other,Planeswalker | SacMessage$ any number of creatures and/or planeswalkers | RememberSacrificed$ True | Optional$ True | SubAbility$ DevourCounters
SVar:DevourCounters:DB$ PutCounter | Defined$ Self | CounterType$ P1P1 | CounterNum$ Devour2X | ETB$ True | SubAbility$ DevourCleanup
SVar:DevourCleanup:DB$ Cleanup | ClearRemembered$ True | SubAbility$ DevourETB
SVar:DevourETB:DB$ ChangeZone | Hidden$ True | Origin$ All | Destination$ Battlefield | Defined$ ReplacedCard
SVar:DevourSacX:Count$Valid Creature.YouCtrl+Other/Plus.DevourSacY
SVar:DevourSacY:Count$Valid Planeswalker.YouCtrl
SVar:Devour2X:SVar$DevourSize/Times.2
SVar:DevourSize:Count$RememberedSize
AI:RemoveDeck:All
# TODO: Figure out a way to make an AIPreference that would work for this kind of ability, e.g.:
# SVar:AIPreference:Sacrifice$Creature.cmcLE3,Planeswalker.counters_LE2_LOYALTY
DeckHas:Ability$Counters
Oracle:As Devouring Hellion enters the battlefield, you may sacrifice any number of creatures and/or planeswalkers. If you do, it enters with twice that many +1/+1 counters on it.