Pyroclasmic Unmake (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Components:||V, S, M (one ancient red dragon heart worth at least 500 gp, which is consumed by this spell)|
|Duration:||Concentration, up to 8 hours|
Legends say the hearts of ancient red dragons still contain their malicious, destructive prowess. A wizard or sorcerer of great aptitude can summon that very power. After chanting a short incantation spoken in dragon tongue, the ancient dragon heart used as a component of this spell shoots a burning ray of light towards the sky and disintegrates into ash. After few seconds, a gargantuan, fiery, draconic form consisting of volcanic magma and flames slowly manifests above the clouds and proceeds to crash upon a single target creature incinerating it on touch and ravaging its surroundings.
One creature in range must make a Constitution saving throw. On a failed save, the target takes 18d10 fire damage and ignites, taking an extra 3d10 fire damage at the end of each of it turns. On a successful save, the target takes only half the initial damage but is still ignited. These magically ignited flames persist for the duration. If the target drops to 0 hit points or dies while ignited in this manner, its body is turned to ash.
Creatures in a 30 foot radius of the target must roll a Constitution saving throw as well. On a failed save, a creature takes 10d10 fire damage and is pushed 20 feet away from the initial target. On a successful save, it only takes half this damage and isn't pushed.