It is doing chaos damage even after the monster get below 30% hp causing me to at 4% hp on something roll a damage on WOD of 1 that should never happen after it gets below 30% hp all WOD damage is converted to direct damage, sources from UO.com
uo.com
"Damage: Highly Variable. Increased by SDI.
Duration: Instantaneous
Area of Effect: 1 target
Arcane Circle Bonus: +5% hit points per additional arcanist.
This spell can possibly slay any one creature (not players) that is under 5-30% of its maximum health. Creatures that are not slain outright take chaos damage instead. Creatures that are under 5-30% of their health take direct damage."
Spellweaving – Ultima Online
uo.com
"Damage: Highly Variable. Increased by SDI.
Duration: Instantaneous
Area of Effect: 1 target
Arcane Circle Bonus: +5% hit points per additional arcanist.
This spell can possibly slay any one creature (not players) that is under 5-30% of its maximum health. Creatures that are not slain outright take chaos damage instead. Creatures that are under 5-30% of their health take direct damage."