This is a list of lair actions available if Acererak is present in the Apotheosis Room. This is Room 30 in the Fortress of Conclusion. He is almost certainly there when the characters enter.
Acererak’s Legenary Actions
| Per Spell
| Per Spell
|The target is placed into a temporary state of suspended animation
|Lasts for one round
| Time stopped ratio 1 rnd/3rds, 15’ radius
| 3 rounds
|Gravity is reversed in a 15 × 15 foot area
|This lasts for one round
|A 20 × 20 cube of fog appears. A creature who falls victim to the mind fog suffers -2 penalties to all saving throws against two categories of magic: all spells of the illusion/phantasm and enchantment/charm schools that affect the mind directly; and spells of 1st through 5th level which affect the mind directly.
| The fog lasts one round. The penalties persist for 3 turns
|Evard’s Black Tentacles
| Many rubbery, black tentacles appear in the 20×20×20 area of effect. The target of a tentacle attack must roll a saving throw vs. spell. If this succeeds, the subject suffers 1d4 points of damage from contact with the tentacle; the tentacle is then destroyed. Failure to save indicates that the damage inflicted is 2d4 points, the ebon member is wrapped around its subject, and damage will be 3d4 points on the second and all succeeding rounds