Spiked Club

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) bludgeoning damage plus 2 (1d4) piercing damage.

Throttle

Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 4 (1d4 + 2) bludgeoning damage and the target is grappled (escape DC 12) and can't breathe. Until this grapple ends the grimlock can't use any attack other than throttle and only against the grappled target and it makes this attack with advantage.

Sling

Ranged Weapon Attack: +4 to hit, range 30/120 ft., one target. Hit: 4 (1d4 + 2) bludgeoning damage.