Poison Bloodline

Bone Rot-Poison

At 1st level your gain the ability to make your poison far more invasive and effective. Creatures only benefit from resistance or immunity to your spells that deal poison if they have accompying resistance or immunity to acid damage. If a creature has immunity to poison damage and only resistance to acid damage it still benefits from resistance but not immunity.

Creatures that are immune to the poisoned condition only benefit from advantage on the saving throws against your spells and and abilities that provide the poison condition.

Additionally spells that would usually deal acid damage you can alter to deal poison damage.

Poisonous Body

At 1st level your body becomes higly poisonous, your flesh and blood are likely to kill any creature that consumes it.

Any creature that comes in direct contact with you, (grapple, swallow or has made an unarmed/ natural weapon attack), suffers disadvantage on saves made against any of your spells that deal poison damage until the end of its next turn.

Additionally while in direct contact or using a touch spell you can cast a poison spell even if you are not able to perform the neccessary vocal or somatic components, the nature of a spell being cast is still obvious however.

True Poisonous Body

At 6th level you gain resistance to poison damage, advantage on saving throws vs poison and you can add your charisma modifier to your spells that deal poison damage.

Body of Snakes

At 14th level you gain the ability to take form of creatures of your bloodline. When you take damage or are grappled you may use your reaction to polmorph into a snake, toad, spider or scorpion of CR 3 or lower. While doing so you maintain your own mental stats and are able to cast poison spells without costly material components, otherwise this functions as the spell polymorph.

After doing so you must take a long rest before you can use this ability again.

Poison to Panacea

At 18th level, you are able to control poison and turn it into something to heal your allies. Allies caught in your spells that deal poison damage suffer no damage and spells are first levels above heal allies. Your poison spells heal allies caught inside for 1d8 for every 3 levels of spell slot used, round up, and your spells of 4th or higher removes the poisoned condition from allies.