Space Dweller. Sheldon can breathe normally in a vacuum.

Spellcasting (Psionics). Sheldon casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 14):

At will: light, mage hand (the hand is invisible)

1/day each: dimension door, telekinesis

Multiattack. Sheldon makes either two Bite attacks, two Blueberry Fling attacks, or one of each.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit:7 (1d6 + 4) piercing damage plus 4 (1d8) psychic damage.

Blueberry Fling. Ranged Weapon Attack: +7 to hit, range 30 ft., one creature. Hit:11 (2d6 + 4) blueberry damage.

Jetstream Breath (Recharge 5–6). Sheldon exhales a line of magical wind that is 60 feet long and 5 feet wide. Each creature in that area must make a DC 15 Strength saving throw. On a failed save, the creature takes 21 (6d6) force damage, is pushed 15 feet away from Sheldon, and has the prone condition. On a successful save, the creature takes half as much damage only.

Wind Dash (2/Day). Sheldon summons a powerful gust of wind and flies up to his speed. This movement doesn't provoke opportunity attacks. At the end of this movement, each creature within 5 feet of Sheldon must succeed on a DC 15 Strength saving throw or have the prone condition, as the wind bursts around Sheldon.