Unstable Mutation Table

Level 1	Level 2	Level 3	Level 4	Effect
01-05	01-08	01-09	01-11	Your body starts to become formless. You have disadvantage on Dexterity saving throws.
06-10	09-16	10-18	12-22	You start to become rigid and brittle, making resting less effective. When you consume a hit dice, you do not add your constitution modifier to the result.
11-15	17-24	19-27	23-33	Your body starts sweating a viscous substance that hardens quickly. You cannot doff armour or change clothes. Dropping, stowing, or interacting with an object requires an action.
16-24	25-32	28-36	34-43	You immediately throw up a thick, black ichor and begin feeling nauseous. You do not benefit from the effects of any food, drink, or potions consumed.
25-32	33-40	37-45	44-52	You are only able to form one-word sentences in a guttural voice you do not recognise. You can still cast spells with verbal components.
43-40	35-48	46-54	53-61	Your legs become unresponsive and difficult to move. Your movement speed decreases by 10 feet.
41-48	42-56	55-63	62-70	Your body begins fighting against any form you take. You cannot make reactions.
49-56	57-64	64-72	71-77	Your arms periodically have a will of their own, causing your reaction speed to slow while you regain control of them. You have disadvantage on Dexterity ability checks to determine initiative order.
57-64	65-72	73-80	78-84	Your skin quivers and shifts, while your appearance constantly changes. Every 30 seconds a defining feature of appearance changes, such as hair colour, facial features, or body proportions.
65-81	73-83	81-89	85-91	Nothing happens.
82-91	84-92	90-95	92-96	You become immune to the grappled and restrained conditions.
92-100	93-100	96-100	97-100	If you would gain hit points from a spell or ability other than your own, you gain that many hit points plus your Constitution modifier instead.