Archmage Caelmir, the Chronarch Ascendant

Legendary Resistance (3/Day). If Caelmir fails a saving throw, he can choose to succeed instead.

Temporal Awareness. Caelmir cannot be surprised, and always acts on initiative count 30.

Arcane Mastery. Caelmir ignores components of all spells. Counterspell and Dispel Magic automatically succeed against spells of 6th level or lower.

Mythic Trait – Chronarch Ascendant. When Caelmir is reduced to 0 hit points, instead of falling, he reshapes his body into pure time-energy. His HP resets to 170, all conditions are cleared, and he gains access to Mythic Lair Actions & Mythic Actions.

Temporal Bolt. Ranged Spell Attack: +13 to hit, range 120 ft., one target. Hit: 28 (6d8+6) force damage, target must succeed on DC 19 Wisdom save or lose its reaction until start of next turn.

Fractured Reality (Recharge 5–6). Caelmir creates overlapping timeline fractures. Each creature of his choice within 30 ft. must make a DC 20 Constitution save or take 45 (10d8) force + psychic damage and be stunned until the end of their next turn.

Bonus Action Name. Enter the description for how bonus actions work for your monster here.

Reaction Name. Enter the description for your action.

Caelmir can take 3 legendary actions, 1 at a time, at the end of other turns:

• Chronal Step. Caelmir teleports up to 30 ft. and casts a cantrip.

• Temporal Rewind (Costs 2). Forces one creature within 60 ft. to reroll its last attack roll, ability check, or saving throw. Must use the new roll.

• Fracture Ally (Costs 3). Summons a time-echo duplicate of an enemy within 20 ft., forcing the ally to fight themselves (duplicate has half the target’s HP).

When in Mythic form (HP reset phase 2), Caelmir gains new legendary options:

• Future Collapse (Costs 2). Choose one creature. That creature sees its next 2 turns vanish—loses one action on its upcoming turns automatically.

• Rewrite Destiny (Costs 3). Heal 40 HP. All creatures must repeat the last saving throw they succeeded on against Caelmir (reroll with disadvantage).

• Summon Timeline Echoes (1/Rest). Each PC manifests a copy at half HP. Echos act on initiative 10, mimicking PCs’ basic abilities.