Base Class: Paladin
A Paladin of a warped purpose. As mushrooms and plague recycle living creatures, so do you with an increased versatility and an aggressive edge Decay normally can't afford.
Metagenesis
Grants a variety of abilities:
Devour weapons to grow them from your Infested flesh.
Reach out with a barbed tendon to grapple terrain or opponents.
Store benevolent cancer on others to heal their wounds as they occur.
Connect creatures with external arteries and veins to share or transfer blood.
Virulence
Stomp harshly, rupturing the ground before you in a line of infested spines to siphon blood and energy from those hit. For every two enemies struck, regain a first level Spell Slot for use.
Cruelty of Infestation
Grants advantage to Intimidation and disadvantage to Persuasion rolls as you fester ever longer.
Allows you change the battlefield to suit you better and spawn a few helpers.
Undying Monument of Decay
After consuming enough flesh and living or dead material, you can cheat death. Reviving using this method permanently lowers your Casting Stat score by 1 point, on each revival.