- Unlike other forms of sleep, the gradual HP reduction from this attack will not cause the targets to awaken.
- Effects of Nightmare can be overwritten by Sleepga II
- Unlike Diabolos Prime, any damage to the sleeping mob will wake them up.
- Mobs with any DoT effect on can be slept with Nightmare.
- Mobs put to sleep with other DoT effect on will wake up immediately if someone overwrites nightmare with Sleep II or Sleepga II.
- Can occasionally miss entirely.
- "No effect" means the target is already affected by a Sleep II-class sleep.
- "Evades" means a resist.
- Essentially this blood pact has 2 effects:
- Duration insteads +2 seconds per skill over cap and maxing out at 180 seconds.
Fealty will not prevent the Sleep from taking effect like it normally does against Sleep, Sleepga and other sources.
- It may be possible to build resistance to Nightmare's Sleep effect.

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