Aberrant (Origin) 280 (MM) ability check 26 (PHB) ability modifiers 17 (PHB) ability scores, generating 17 (PHB) Ability Scores 16 (PHB) Aboleth Servitor 9 (MM) Aboleth 8 (MM) Abomination 10 (MM) absent players 121, 122 (DMG) Abyss, the 160 (DMG) Accused Shroud (power) 140 (PHB) AC 274 (PHB) Acid Arrow (power) 160 (PHB) Acid Storm (power) 167 (PHB) Acid Wave (power) 166 (PHB) Acid (Keyword) 280 (MM) Acolyte Power (feat) 209 (PHB) Acrobat Boots (magic item) 246 (PHB) acrobatic stunt (skill check) 180 (PHB) Acrobatics skill 180 (PHB) Act of Desperation (power) 84 (PHB) Act Together (power) 115 (PHB) action point 259, 286 (PHB) action point 41, 123 (DMG) Action Recovery (feat) 202 (PHB) Action Surge (feat) 193 (PHB) actor (player motivation) 8 (DMG) Adamantine Strike (power) 85 (PHB) Adept Po