Giant Ant Queen
Large Beast, unaligned
Armor Class 15 (natural armor)
Hit Points 85 (10d10+30)
Speed walk +40
Challenge 4
Senses blindsight 60 ft., passive Perception 10
Languages -
Special Abilities
Keen Smell. The giant ant queen has advantage on Wisdom (Perception) checks that rely on smell.
Queen's Scent. Giant ants defending a queen gain advantage on all attack rolls.
Actions
Multiattack. The giant ant queen makes two bite attacks and one sting attack.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) bludgeoning damage and the target is grappled (escape DC 13). Until this grapple ends, the target is restrained, and the giant ant can't bite a different target.
Sting. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) piercing damage plus 22 (4d10) poison damage, or half as much poison damage with a successful DC 14 Constitution saving throw.
Source: Tome of Beasts · OGL/Open