Multiattack. The yithian makes three attacks: two with its pincer, and one with its Spore Cloud. If its Lightning Rifle is available, it may use it in place of its Spore Cloud.

Pincer. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 10 (2d8 + 1) piercing damage.

Spore Cloud. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 13 (3d8) poison damage, and must succeed a DC 15 Constitution saving throw or become poisoned for 1 minute. An affected creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Lightning Rifle (Recharge 5-6). Ranged Spell Attack: +6 to hit, range 30 ft., one target. Hit: 31 (6d8 + 4) lightning damage, and must succeed a DC 15 Constitution saving throw or be paralyzed for 1 minute. An affected creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.