Empower Spores

You draw on the power of your symbiotic entity to make your spores more potent. 

Each dead you raise now carries spores in their body that can be spread to other creatures. Each time the dead creature makes an attack, the opposing creature makes a dexterity saving throw. On a successful throw, the creature only takes the damage from the attack. On a failed throw they are infected with spores that do 1d4 poison damage each turn until death or until the spell ends. 

If the creature dies while infected, they reanimate as a zombie thrall.