Vudruk's Garden of Death

An enemy that is below 10 percent of total hit points will experience their body exploding into vibrant flowers and plants as it shoots out into a 40ft radius around them, dealing 5d8 necrotic damage every turn until the enemies clear that radius. This spell will instantly destroy the target, if the target fails a Constitution Saving throw (DC=6+ Proficiency modifier + Intelligence Modifier). If the target succeeds the saving throw, they will instead be immobilized for 4 turns. Damage dealt can be used to recharge spell slots totaling up to a 5th level spell slot, heal allies that are within 80ft of you, or instead damage can be allocated to one enemy instead of multiple.