Multiattack

Two Mycelium Spike attacks.

Mycelium Spike

Melee Weapon Attack: +7 to hit, 15 ft., one target, 15 (2d10+4) piercing damage and grappled (escape DC 15) if it doesn't have 2 others grappled (DC 15 Str not grappled).

Excavate

If underground creates 20' square cover on ground over self and lurks just below surface. Cover identical to ground. If creature enters cover's space one Mycelium Spike vs. creature as reaction destroying cover. Target: disadvantage on save to avoid grapple.