Spellcasting. Sir Healbot is a 3rd-level spellcaster. His spellcasting ability is Wisdom (spell save DC 11). He has the following cleric spells prepared:

Cantrips (at will): mending, resistance, spare the dying

1st level (4 slots): cure wounds, sanctuary

2nd level (2 slots): aid, lesser restoration

Warhammer. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) bludgeoning damage, or 7 (1d10 + 2) bludgeoning damage if used with two hands to make a melee attack.

Healer's Kit. As an action, Sir Healbot can stabilize a creature that has 0 hit points, without needing to make a medicine check.

Martial Role (Defender). Sir Healbot can use his reaction to impose disadvantage on the attack roll of a creature within 5 feet of him whose target isn't himself, provided he can see the attacker.