Basarios

Rock. It can disguise itself as a rock

Multiattack. The basarios does 3 attacks, a headbutt, a stomp, and a slam

Headbutt. Melee Attack: +9 to hit, reach 5 ft., 1 target. Hit: (3d6 + 6) bludgeoning  damage. 

Stomp. Melee attack: +8 to hit, reach 5 ft., 1 target. Hit: 3d4 + 6

Slam. Melee attack: + 8 to hit, reach 5ft circle., all targets. Hit: 3d4 + 4

explosion. Ranged attack: + 9 to hit, reach 15ft circle., all targets. Hit: 3d8 + 8 flame damage 

Gas. Ranged status: DC 15, reach 20 ft circle., all targets. Hit: sleep or poison

lava bombs: Ranged attack: + 10 to hit, reach, 30 ft., 3 targets. Hit: 3d6 + 5 flame damage

Lava laser. Ranged Attack: +10 to hit, range 60 ft., 1 target. Hit: (4d6 + 10) flame damage.

Break. When basarios reaches 60 hp it’s AC lowers by 2.