Deathless + Sanctified Spells

[Yogibear41]

I am a good aligned character with the deathless type. I cast a Sanctified spell that has a sacrifice of strength damage when the spell ends. Deathless are normally immune to damage to their physical ability scores. What Happens? Do I simply avoid the negative effects? Am I unable to use the spell? Do I take the damage even though I am normally immune?

[MinimanMidget]

Previous thread on this topic: https://forums.giantitp.com/showthread.php?319295-Sanctified-Spells

[ShurikVch]

Note: according to FAQ (http://archive.wizards.com/default.asp?x=dnd/er/20030221a), Undead which casts Corrupt spells are suffering Cha damage or drain - regardless of being usually immune to ability damage/drain

When an undead creature uses a corrupt spell with an ability damage or ability drain corruption cost, the undead creature takes the damage or the drain against its Charisma score, no matter what ability the spell normally damages or drains. If the damage or drain reduces the undead creature’s Charisma to 0, the creature becomes helpless until the loss of Charisma is somehow restored or repaired. Any ability damage from a corruption cost heals at the rate of 1 point per day, just like any other ability damage. Ability drain can be healed by the appropriate spells.