Oozemancer

 While many people regard oozes as mindless forces of destruction, oozemancers make these gelatinous creatures their allies and companions. Though it might make others’ skin crawl, an oozemancer’s fondness for their formless pets grants them a supernatural understanding of the creatures.

Ooze Familiar

When you choose this archetype at 2nd level, you master the conjuration of tame oozes. You add the find familiar spell to your spellbook. When you cast the spell, you can choose one of the normal forms for your familiar or choose a gray ooze . When you take the Attack action, you can forgo one of your own attacks to allow your familiar to make one attack of its own.

In addition, oozes you summon move extremely quickly, increasing their Speed to 25 feet.

Ooze Within

Also starting at 2nd level, your body becomes more ooze-like, allowing you to thwart attackers. Whenever you are subjected to a critical hit, the hit is treated as a normal hit instead. In addition, you are immune to Sneak Attack damage from class features or traits. Finally, you have advantage on ability checks and saving throws you make to escape a grapple .

Improved Ooze Familiar

Starting at 6th level, when you cast find familiar, you can choose to summon a gelatinous cube or ochre jelly . At 9th level, you can summon a euphoria cube (DDG) or flash jelly (DDG).

Liquid Form

At 10th level, you learn revolting arcane secrets that allow you to transform your body into slime. As a bonus action, you can adopt a liquid form. You revert to your normal form after 1 minute, if you are incapacitated , or if you use another bonus action to end the effect early. Once you have used this ability, you must finish a short or long rest before you can do so again. In liquid form, your statistics are unchanged except for one of the following options, which you choose when you transform:

• You liquefy your bones, organs, and equipment to gain an amorphous form. While you are amorphous, you can pass through an opening as narrow as 1 inch wide without squeezing. While in this form, you can’t use or gain any benefit from your equipment.
• You liquefy your skin, causing your body and equipment to become covered with a viscous, sticky slime. While you are coated in this way, you leave slimy, wet prints on objects and surfaces you touch or walk upon. You gain a climb speed equal to your Speed and can walk on walls and upside down on ceilings.  Additionally, when a creature within 5 feet hits you with a melee attack, it is covered with slime. The creature has disadvantage on the next attack it makes before the end of its next turn.

Ooze Without

Starting at 14th level, while you are bloodied , you can use a bonus action to cause your viscous blood to coalesce into a black pudding that appears in an unoccupied space within 5 feet of you. This ooze takes its turn immediately after yours and obeys your verbal commands. Without such commands, the ooze only defends itself. It disappears after 1 hour, when reduced to 0 hit points, or if it can’t sense another creature at the end of its turn. Once you use this ability, you must finish a long rest before you can do so again.