1 Combat begins
Units within her mist are revealed to her unless magically hidden. Determine surprise before combat using the core Surprise rule. If not surprised, spend her Reaction and 1 Mana on Hide and Seek. Roll Maneuver + Agility and record the total. If surprised, she cannot use this opening Reaction until her turn begins.
2 Choose her Favorite
While she is hidden, choose the smallest or youngest character as her Favorite. Focus her soul-siphoning attacks on them. She will not willingly move away from them unless damaged.
3 Resolve discovery before damage
At the start of each unit’s turn within her mist while she is hidden, offer the Bonus Action discovery attempt. Roll Perception + Intellect against her recorded Maneuver + Agility total.
Success reveals her to the party and ends concealment and further mist damage until she hides again. Failure triggers mist damage against that unit. A unit that does not attempt discovery also takes mist damage.
For mist damage, roll Spirit + supplemental Invoke d12 as Madden against Ward + Spirit. Her Spirit has Advantage against her Favorite; another unit’s Ward has Advantage. A Damaging Hit makes the unit Mad until the end of its next turn, plus one turn for each critical on her Spirit die. While Mad, it cannot voluntarily leave the mist and has Disadvantage on Intellect and Tact Skills.
4 Her turn begins
Refresh her Reaction under the core rules. Spend her Bonus Action and 2 Mana to teleport up to 30 feet to an unblocked location within 5 feet of her Favorite, then her Action and 3 Mana on Peek-a-boo’s soul-siphoning scare.
Roll Spirit + supplemental Invoke d12 as Wither against Ward + Spirit. If she remained hidden until this attack, her Spirit has Advantage. The attack reveals her. On a Damaging Hit, recover d4 Resolve; if the attack kills her Favorite, recover Resolve equal to the damage dealt instead. Cap recovery at her Resolve Maximum.
5 She remains exposed
She is now visible and relies on her refreshed Reaction for defense. When an incoming effect triggers her defensive Reaction, resolve one applicable defense. Use Evade only when avoidance is permitted.
If that defense leaves her unharmed and unaffected by a condition preventing teleporting or hiding, continue her active defensive Reaction: spend 2 Mana to teleport up to 30 feet to an unblocked location, then 1 Mana to hide. Roll Maneuver + Agility with Advantage on Maneuver and record the new total. Returning to hiding ends her active defensive window.
If she takes damage or is affected by a condition that prevents her attempt, she cannot return to hiding through that Reaction.
6 Repeat the game
After she hides again, resume discovery attempts before mist damage. Discovery exposes her early; remaining hidden preserves Advantage for her next soul-siphoning attack. Her mist dissipates when she dies.