Name:Dark Sphere
ManaCost:0
Types:Artifact
A:AB$ ChooseSource | Cost$ T Sac<1/CARDNAME> | Choices$ Card,Emblem | AILogic$ NeedsPrevention | SubAbility$ DBEffect | SpellDescription$ The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.
SVar:DBEffect:DB$ Effect | ReplacementEffects$ DBPrevent
SVar:DBPrevent:Event$ DamageDone | ActiveZones$ Command | ValidSource$ Card.ChosenCardStrict,Emblem.ChosenCard | ValidTarget$ You | ReplaceWith$ DBReplace | PreventionEffect$ True | Description$ The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.
SVar:DBReplace:DB$ ReplaceDamage | Amount$ ShieldAmount | SubAbility$ ExileEffect
SVar:ExileEffect:DB$ ChangeZone | Defined$ Self | Origin$ Command | Destination$ Exile
SVar:ShieldAmount:ReplaceCount$DamageAmount/HalfDown
DeckHas:Ability$Sacrifice
Oracle:{T}, Sacrifice Dark Sphere: The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.
