Tome of Beasts
Keen Smell. The giant ant has advantage on Wisdom (Perception) checks that rely on smell.
blindsight 60 ft., passive Perception 9
Multiattack. The giant ant makes one bite attack and one sting attack.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) 1d8+2 bludgeoning damage and the target is grappled (escape DC 12). Until this grapple ends, the target is restrained, and the giant ant can’t bite a different target.
Sting. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) 1d8+2 piercing damage, and the target must make a DC 12 Constitution saving throw, taking 22 (4d10) 4d10 poison damage on a failed save, or half as much damage on a successful one.