Mi-Go
Medium Aberration, Neutral EvilAC 16
HP 120 (16d8 + 48)
Speed 30 ft., fly 30 ft.
STR
20 (+5)
Save +5
DEX
15 (+2)
Save +6
CON
16 (+3)
Save +3
INT
21 (+5)
Save +9
WIS
15 (+2)
Save +6
CHA
12 (+1)
Save +1
Saving Throws DEX +6, INT +9, WIS +6
Skills Arcana +9, Perception +6, Stealth +6
Resistances Acid; Lightning
Condition Immunities Charmed, Frightened
Senses Truesight 120 ft., Passive Perception 16
Languages all; telepathy 120 ft.
CR 9
Traits
Magic Resistance. The mi-go has Advantage on saving throws against spells and other magical effects.
Silver Canister. The mi-go has a silver canister. While holding or carrying the canister, the mi-go can use its Extract Brain action. The canister has AC 15, HP 40, and Resistance to all damage. The canister breaks if reduced to 0 Hit Points. If the canister is broken, any brains inside it are destroyed. The mi-go can create a new canister after 7 days.
Actions
Multiattack. The mi-go makes two Pincer attacks. It can replace one attack with a use of Dazing Ray if available.
Pincer. Melee Attack Roll: +9, reach 5 ft. Hit: 23 (4d8 + 5) Slashing damage plus 16 (3d10) Acid damage. If the target is a Medium or smaller creature, it has the Grappled condition (escape 15) from one of two pincers.
Dazing Ray (Recharge 4+). dex 17, one creature the mi-go can see within 60 feet. Failure: 22 (4d10) Lightning damage plus 10 (3d6) Force damage, and the target has the Stunned condition until the end of the mi-go's next turn.
Extract Brain (Requires Silver Canister). con 17, one creature that is Grappled by the mi-go or that has the Stunned condition. Failure: 77 (14d10) Piercing damage. Success: Half damage. Failure or Success: If this damage reduces the target to 0 Hit Points, the mi-go kills it, removes its brain, and places the brain in its silver canister.