Multiattack

The stellar rorqual makes two attacks: one with its head smash and one with its tail slap. Alternatively, it can use Energy Burst twice.

Head Smash

Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 30 (4d10 + 8) bludgeoning damage.

Tail Slap

Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 26 (4d8 + 8) bludgeoning damage.

Energy Burst

Ranged Spell Attack: +8 to hit, range 120 ft., one target. Hit: 24 (7d6) force damage.

Planar Dive

The stellar rorqual can transport itself and any willing creature inside its mouth to the Astral, Ethereal, or Material Planes or to the Void. This works like the plane shift spell, except the stellar rorqual can transport any number of willing creatures as long as they are inside its mouth. The stellar rorqual can't use this action to banish an unwilling creature.