Multiattack

Two Slam attacks. If the pyrite pile hits one Med or smaller creature with both attacks the target is grappled (escape DC 16). Until this grapple ends the target takes 7 (2d6) bludgeoning damage at the start of each of its turns. The pyrite pile can have only one creature grappled at a time.

Slam

Melee Weapon Attack: +8 to hit, 5 ft., one target, 15 (3d6+5) bludgeoning damage.

Hurl Nugget

Ranged Weapon Attack: +8 to hit 20/60' one target 14 (2d8+5) bludgeoning damage.

Eat Gold

Absorbs 52 (8d12) gp worth of nonmagical items and coins made of precious metals ignoring copper worn or carried by one creature grappled by it and the pile regains hp equal to half that. Absorbed metal is destroyed.