Berenike Knight (5e Creature)
From D&D Wiki
Medium undead, lawful neutral
Undead Fortitude. If damage reduces the berenike knight to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the berenike knight drops to 1 hit point instead.
Multiattack. The berenike knight makes two greatsword attacks.
Greatsword. Melee Weapon Attack: +6 to hit, reach 5 ft., Hit: 11 (2d6 + 4) slashing damage.
Shield Barrier. The berenike knight plants its shield in the ground in front of it. Until the start of its next turn, it has advantage on Strength checks and saving throws against being moved against its will, and all attacks against it have disadvantage.
The heavy armored undead defenders of Anor Londo.