Gladiator

Melee or Ranged Weapon Attack: +7 to hit, reach 5 ft. or range 20/60 ft.. Hit: 11 (2d6 + 4) piercing damage.

The gladiator makes three Spear attacks. It can replace one attack with a use of Shield Bash.

Strength Saving Throw: DC 15, one creature within 5 ft. that the gladiator can see.
Failure: 9 (2d4 + 4) bludgeoning damage. If the target is a Medium or smaller creature, it has the Prone condition.

Trigger: The gladiator is hit by a melee attack roll while holding a weapon. Response: The gladiator adds 3 to its AC against that attack, possibly causing it to miss.