Brokkos, Apex of Forever

Undying Apex: If Brokkos, Apex of Forever dies, it reappears within 1d4 days in the nearest swamp.

Majestic Aura: Attacks made against Brokkos have disadvantage.

Spellcasting. Brokkos, Apex of Forever is a 1st-level spellcaster. Its spellcasting ability is WIS (spell save DC 10, +5 to hit with spell attacks). Brokkos has following Cleric spells prepared:

Cantrips (at will): Thaumaturgy, Spare the Dying
1st level (2 slots): Cure Wounds, Healing Word

Stomp. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 23 (1d20 + 6)  force damage. 

Piercing Horn. Melee Weapon Attack: +10 to hit, range 10 ft., 1 target. Hit: 30 (2d10+12)  piercing damage.

Rapid Defense:  If Brokkos would take damage from an attack that he is aware he of, he may turn briefly into stone and take 0 damage instead.

Brokkos may take 1 legendary action at the end of another creature's turn in combat. 

Mutate: If there is another creature in combat, and if that creature is willing, Brokkos may absorb that creature into himself and add two abilities of that creature to himself. 

Swampwalk (1/day): If Brokkos, Apex of Forever would be attacked in any way, it can instead sink into the mud of the swamp and reappear up to 1 mile away. This action can only be used if Brokkos is in a swamp.