Legendary Resistance (3/day). If Xanthus fails a saving throw, he can choose to succeed instead.
Magic Resistance. Xanthus has advantage on saving throws against spells and magical effects.
Step Through Time. Xanthus steps through time, teleporting himself and up to 1 other creature up to 120 feet in any direction so long as there is ground for them to stand on. (Recharge 5-6)
Alter Initiative. Xanthus changes the initiative order, switching the positions of 2 creatures in the initiative count. (1/day)
Spellcasting. The Xanthus is a 14th-level Bard. His spellcasting ability is Charisma (spell save DC 19, +11 to hit with spell attacks). Xanthus has following Bard spells prepared:
Cantrips (at will): Mage Hand, Message, Minor Illusion, Prestidigitation
1st level (4 slots): Bane, Charm Person, Healing Word, Silvery Barbs, Thunderwave
2nd level (3 slots): Blindness/Deafness, Crown of Madness, Heat Metal, Vortex Warp
3rd level (3 slots): Dispel Magic, Fear
4th level (3 slots): Hallucinatory Terrain, Psychic Lance
5th level (2 slots): Mislead, Synaptic Static
6th level (1 slot): Eyebite
7th level (1 slot): Regenerate
Time Rift. Xanthus creates an area of warped time that collapses at the beginning of his next turn. Choose a point within 90 ft. that Xanthus can see, a sphere with a radius of 30 ft. appears that collapses at the beginning of Xanthus’s next turn. Any creatures caught in the area must make a Dexterity saving throw of 20 or take 80 (20d6) force damage and be dragged 20 towards the center of the sphere, taking half damage and not being dragged towards the center. (Recharge 6)
Warp Space. Melee Weapon Attack: +16 to hit, reach 10 ft., 1 target. Hit: 54 (6d12 + 12) force damage.
Fated to Win. Whenever Xanthus is hit by an attack he can use his reaction to have the attack miss instead.
Xanthus can take 4 Legendary Actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature’s turn. Xanthus regains spent legendary actions at the start of his turn.
Warp Space. (Costs 1 Action). Xanthus uses Warp Space on one creature within range.
Cast a Spell. (Costs 2 Actions). Xanthus casts a spell if he has the ability to do so from his spell list.