Ultima (Artema Spell)「True Dweomer」

Ultima 「True Dweomer」

9th-level Evocation (Sorcerer, Wizard)

• Casting Time: 1 action
• Range: 300 feet
• Components: V, S, M
• Duration: Instantaneous

You tap into the foundational, unfiltered raw energy of the Weave, manifesting a brilliant, expanding sphere of iridescent emerald and sapphire destructive force centered on a point you can see within range. The sphere expands out to a 15-foot radius. Each creature of your choice within the area must make a Constitution saving throw. On a failed save, a target takes 999 force damage. This damage ignores resistance and treats immunity as resistance. If this damage reduces a creature to 0 hit points, its physical form and soul are utterly disintegrated into nothingness, leaving no ash behind. Furthermore, targets cannot use Legendary Resistance, and creatures can’t benefit from advantage on the saving throw. On a successful save, a target takes half as much damage and is not disintegrated.  This spell cannot be affected by Counterspell.

Additionally, you must succeed on a DC 50 Intelligence (Arcana) check to decipher the foundational science of high-magic spellcraft and anchor the cataclysmic energy. As part of this check, you automatically suffer backlash, taking 99 (18d10) psychic damage from the immense, reality-shattering destruction.  If the check fails, the spell fails completely, the component shatters regardless, you take an extra 99 (18d10) force damage. Immediately after you cast this spell, all of your remaining spell slots are completely expended, and your magical channels are so severely scorched that you cannot cast cantrips until you finish a Short or Long Rest. Furthermore, you gain 1 level of Exhaustion. This effects ignores resistance and immunity. While you have Exhaustion levels gained from this spell, finishing a Long Rest neither restores lost Hit Points nor reduces your Exhaustion level.

True Dweomer. Magic of high power automatically fails the very first time you cast this type of spell, requiring you to expend twice the amount of time and resources to effectively complete this magic of high power at least once. In doing so, and successfully casting a true dweomer spell, you attract instant cosmic scrutiny. The severe metaphysical friction of shaping this forbidden magic weakens your form. After casting this spell, each time you cast a spell until you finish a Long Rest, you take 1d10 necrotic damage per level of that spell. This damage ignores resistance and immunity. Furthermore, your Constitution score becomes 3 for 2d4 days while simultaneously your Intelligence score becomes 3 for one month. For each day you spend resting and doing nothing more than light activity, your remaining recovery time for your Constitution score decreases by 2 days. Finally, there is a 33 percent chance that you are unable to cast Ultima ever again.

Lore Appendix: Ultima

1. The Creator: The reckless planar demolitionist Aulump of Netheril originally formulated this concentrated blast while attempting to design a spell capable of completely vaporizing an entire floating enclave in a single incantation.
2. The Turning Point: The early deployment of this cataclysmic spell craft forced a definitive truce during the Guldor Magocracy Civil War, where the demonstration of complete area erasure terrified both factions into instantaneous disarmament.
3. The Most Devastating Casting: During the final hours of the Spellplague, an elite wizard archmage successfully executed this weave upon an invading planar citadel over the Plains of Purple Dust; the resulting detonation tore a permanent crater into the earth that glows with iridescent white magical feedback to this day.
4. Suppression & Loss: Witnessing a spell capable of instantly dissolving localized reality without leaving a trace of elemental ash, the goddess of magic Mystra systematically expunged the raw calculations of the energy array from mortal grimoires.
5. The Modern Legacy: Today, the formula is missing from standard libraries across the multiverse; its only surviving schematics are locked inside a heavily warded lead vault deep within the city of Sigil, fiercely guarded by cosmic entities who ensure it remains forgotten.