Actions

Multiattack. The Sword Sentinel makes two standard attacks, either two with its sword, or one with its sword and one with its fist or foot or makes one Blade Sweep attack.   Runic Blade. Melee Weapon Attack. +10 to hit, reach 5 ft., one target. Hit: 2d6+6 bludgeoning damage.   Forceful Fist. Melee Weapon Attack. +10 to hit, reach 5 ft., one target. Hit: 1d6+6 bludgeoning damage.   Crushing Step. Melee Weapon Attack. +10 to hit, reach 5 ft., one target. Hit: 1d6+6 bludgeoning damage.   Blade Sweep. The Sword Sentinel brings its blade level with its target and swings in a powerful wide and sweeping arc. Four adjacent squares in a 20 foot zone are subjected to the attack. Each target in this zone must make a successful DC 18 Dexterity (Acrobatics) saving throw or suffer 2d12+6 bludgeoning damage. A successful save results in half damage. Only one damage roll is made for all targets in the zone.   Damnation. As a bonus action, the Sword Sentinel swaps places with the Shield Sentinel as long as they are adjacent to one another. This switch provokes no attacks of opportunity. Any remaining movement speed is given to the Shield Sentinel, which may move immediately.

Reactions

Thirsting Blade. When all runes are filled, the Sword Sentinel may expend its reaction to make a Runic Blade attack, even if it is another target's turn.