Caduceus (tier 3)

Channel Divinity (2/rest)

Circle of Mortality. If restoring HP to a creature a 0 health, use the max value for each die that would be rolled.

Potent Spellcasting. Add Caduceus' Charisma modifier to any damage dealt by cleric cantrips.

War Caster. 

• Advantage on Con saving throws to maintain concentration
• Can cast spells while holding a weapon or shield.
• Can use a reaction to cast single target spells as an attack of opportunity.

Spellcasting. Caduceus is a 16-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 18, +10 to hit with spell attacks). Caduceus has following Cleric spells prepared:

Cantrips (at will): Sacred Flame, Resistance, Guidance, Spare the Dying * 
1st level (4 slots): Cure Wounds, Bane, Healing Word, Guiding Bolt, Detect Magic *
2nd level (3 slots): Prayer of Healing, Calm Emotions, Ray of Enfeeblement *
3rd level (3 slots): Dispel Magic, Water Walk, Mass Healing Word, Vampiric Touch *
4th level (3 slots): Freedom of Movement, Death Ward *, Blight* 
5th level (2 slots): Greater Restoration, Antilife Shell * 
6th level (1 slots): Heal 
7th level (1 slots): Conjure Celestial  
8th level (1 slots): Antimagic Field

Staff Attack

Blightstaff (one handed). Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 3 (1d6 + 0) bludgeoning damage. 

Blightstaff (two handed). Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 4 (1d8 + 0) bludgeoning damage. 

Channel Divinity: Path to the Grave

As an action, choose one creature you can see within 30 feet of you, cursing it until the end of your next turn. The next time you or an ally of yours hits the cursed creature with an attack, the creature has [Tooltip Not Found] to all of that attack’s damage, and then the curse ends.

Firbolg Magic (1/rest)

As an action, cast Detect Magic or Disguise Self without expending a spell slot.

Hidden Step (1/rest). As a bonus action, Caduceus turns invisible until the start of his next turn ( or until he takes another action that would cause invisibility to end such as attacking or casting a spell)

Blightstaff Swarm. As a bonus action, Caduceus can unleash a swarm of beetles (for stats see Swarm of Insects: Beetles) from his staff and command them to move up to 30 ft. The swarm lasts up to 1 minute. While the swarm persists, Caduceus can use his bonus action to command them. 

Sentinel at Deaths Door (5/long rest). If Caduceus or an ally within 30 ft of him would suffer a critical hit, he can use a reaction to turn that hit into a normal hit. Any additional effects that would be triggered by the crit are also cancelled.

War Caster. Can cast a single target spell as an attack of opportunity.