Druid: Circle of the Rotbound

Level 2 — Rot Magic   You learn to manipulate rot, disease, and nature’s decomposition:   Additional Spells (always prepared, don’t count against spells known):   1st Level: Ray of Sickness, Entangle   2nd Level: Wither and Bloom (custom spell; can deal necrotic or poison damage in an area, e.g., 2d6 necrotic damage, radius 10 ft, CON save for half)   Rot Affinity: Allies within 5 ft of dying creatures you can see gain temporary hit points equal to your Wisdom modifier.   Level 6 — Mire Stride   Swamp Stride: Difficult terrain in swamps, marshes, or heavy vegetation doesn’t cost extra movement.   Poison Resistance: You have resistance to poison damage.   Spore Step (optional): Once per turn, when you move 10 ft in swamp or overgrowth, creatures in 5 ft must succeed on CON save (DC = 8 + your proficiency + WIS mod) or be poisoned until the start of your next turn.   Level 10 — Fungal Bloom   When a creature dies within 30 ft of you:   Spores Erupt: All creatures of your choice within 10 ft of the corpse:   Allies gain temporary HP equal to your Druid level   Enemies take 2d6 poison damage (CON save for half)   Action Economy: This effect is reaction-like, occurring automatically when a creature dies.   Scales: damage increases to 3d6 at level 14.   Level 14 — Avatar of Rot   You can assume the form of a massive fungal swamp creature (as an enhanced Wild Shape):   Extra HP: Gain +2d10 hit points temporary when transformed.   Poison Aura: Creatures within 10 ft at the start of their turn take 3d6 poison damage (CON save for half).   Duration/Use: Can be used once per short or long rest, lasts up to 10 minutes or until you revert to normal form.   Additional: You retain your Rotbound features and can still cast spells usable in Wild Shape.