Gigantification + Sludge Body perhaps?
New Quirk Name: Sludge Monster
This Transformation type Quirk allows the user to take on a large mass of green slime in a humanoid shape. This form is rather large, being twenty five feet tall. This enhances the user's strength and durability, especially making them far more resilient to kinetic attacks. The user has a minor control over their body while in this state. They can try to stretch themselves out to grab something, try to compact their body to make them even denser, or wrap part of their body around something they touch. This mixed with the user's density can potentially let the user capture others in their body. This gives the user an amazing Quirk for defense, able to tank whatever the world tries to throw at them. They can bulldoze their way through attacks, trap enemies inside their body, smash their way through defenses, pull in allies to protect them from harm, or just belly flop on top of their enemies to hurt them. Though major damage could force the user out of the form, seemingly getting launched out of it. Trying to morph their body will make them more vulnerable to attacks. The user's size can be an issue, such as accidently getting objects or people caught in them or just making them a massive target.













