Pharika's Vessel

Your unhealing wound grows and its pulsing green veins threaten to envelop your entire being, you gain the following benefits:

• You gain immunity to poison and the poisoned condition.
• You gain expertise in the skill you chose when you gained the Pharika's Carrier feat.

As a bonus action, you can let go of your will and allow yourself to become a vessel. You gain the following benefits:

• You gain temporary hit points equal to 5 times your level.
• When you hit a target with a weapon attack or an unarmed attack, that target takes an extra 2d4 poison damage. If the target has the poisoned condition, you instead deal 6d4 poison damage and gain advantage on the attack roll.
• You have advantage on Strength and Constitution saving throws.
• when a creature enters within 5 feet of you for the first time on a turn or starts its turn there, it must make a DC 12 Constitution saving throw or gain the poisoned condition. At the end of each of the target’s turns while they are poisoned, the target must succeed on a Constitution saving throw or take 2d4 poison damage. On a successful save, they lose the poisoned condition and are immune to this effect for 24 hours.

You must use a bonus action to end this ability. If you end your turn and this ability is active, you must make a DC 16 Charisma saving throw (you can choose to fail) or expend one of your hit dice and roll it. You and all allies within 10 feet of you regain hit points equal to the number rolled plus your Constitution modifier. If you end your turn with this ability active and have no hit dice left to expend, you die.