Stone Resolve. The Sentinel takes half damage from magical weapons and attacks. Punishing Bash. The sentinel deals increased damage with shields. Adjudication. When the Sentinel strikes with shield bash, the damage is increased by an additional 1d8 damage (included in the attack).
Multiattack. The Legionnaire makes two attacks using its warhammer or one attack with its warhammer and one with shield bash. Warhammer. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 1d8+3 bludgeoning damage. Shield Bash. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:2d8+3 bludgeoning damage and the target must succeed on a DC 13 Strength saving throw or be knocked prone.