"THERE WILL BE NO MORNING... IN A WORLD WITHOUT MY WALTER!" the spirit shrieks, surging forward towards Anton. Before Kellon can properly ready his warhammer again, she escapes his reach, standing and gliding across the floor into the gap left by the opened nursery fence. Her cold hands reach out to grab Anton by the throat, but he ducks and weaves around her grasp.

Anton waves his wand, casting his spell again and sending her to her knees. Gweyir closes her eyes and focuses on the spell, causing the circle to shift across the floor. The old flames go out and new ones erupt, though they barely seem to singe her spectral form.

Spoiler: Combat Log
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I will assume that Kellon will make an AoO as she leaves his threatened area. However, the attack misses.

Fortunately, the ghost also misses Anton.

Anton casts Suffosio again, knocking the ghost Prone.
Gweyir moves her bonfire onto the ghost's new location, dealing 1 fire damage.
It is Kellon's turn again.