Corpse Drainer. If the sporocyte starts its turn within 5 feet of one or more dead or unconscious creatures, it gains 5 (1d10) temporary hit points and each creature in the area takes an equal amount of necrotic damage. On a roll of 10, a random corpse within 5 feet of the sporocyte dissolves.

Rotting Slam. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage plus 10 (3d6) necrotic damage. A creature reduced to 0 hit points by this damage immediately fails a Death saving throw.

Unfurl Mycelia. The sporocyte spreads a carpet of mycelia over the ground within 5 feet of it. square centered on itself.

While unfurled, the sporocyte's movement speed is 0, the affected area is difficult terrain, and if the sporocyte would gain temporary hit points, it instead gains twice as many temporary hit points. The sporocyte may retract its mycellia as a bonus action.

Spore Gout (1/Day). As a reaction to being hit with a melee attack, the sporocyte releases a torrent of spores in a 15 foot cone.

Each nonplant creature in the area must succeed on a DC 12 Constitution saving throw or take 7 (2d6) poison damage and be infected with Burrow-Diver Mycosis.