[ACKS House Rule] Energy Drain

I recently killed a PC with a wight, and while he got reincarnated, I felt really bad. So I retconned it, and then I rebuilt Energy Drain to still be nasty, but not affect XP.

Energy Drain
The touch of wights, vampires, and several other undead monsters causes Energy Drain. This damage is special in several respects.
1. It cannot be healed naturally- only magical healing is effective.
2. It heals the undead causing it by the same amount.
3. If a character is reduced to 0 hit points by Energy Drain, they die- no attempt at healing can be made. This death counts as Instant Death on the Tampering with Mortality rules.
4. If the character is not doused in holy water or returned to life within 24 hours, they have a chance after 24 hours to return as an undead.
Day 1: 1 in 6.
Day 2: 2 in 6.
Day 3: 3 in 6.
Day 4: 2 in 6.
Day 5: 1 in 6.
After five days, there is no chance to become undead.

In a Sinkhole of Evil:
Shadowed: No change.
Blighted: +1 in 6.
Day 1: 2 in 6.
Day 2: 3 in 6.
Day 3: 4 in 6.
Day 4: 3 in 6.
Day 5: 2 in 6.
Day 6: 1 in 6
Forsaken: +2 in 6.
Day 1: 3 in 6.
Day 2: 4 in 6.
Day 3: 5 in 6.
Day 4: 4 in 6.
Day 5: 3 in 6.
Day 6: 2 in 6.
Day 7: 1 in 6.