Black Blade

conjure a spectral image of the blade of death itself and swing it forwards, sending a single target arc of blackish crimson red flames with golden specks strewn throughout. this deals 30d4 destined death damage (necrotic+force, no enemy can resist death) and inflicts the destined death status on the enemy if it hits, dealing 10d4 damage every turn for 4 turns. the enemy can attempt to resist this by making a constitution save every turn, they must roll a natural 18, 19, or 20 to evade the damage.