Amphibious Belly-Bloat

Either you or a creature you touch have their belly inflated and covered in mucus-covered fleshy coating for the duration. During that time, the creature has +1 to its AC, has its speed reduced by 10 feet, and its unarmed strikes deal an additional 2d6 bludgeoning damage on a hit. If the creature takes a critical hit while under the effects of the spell, the creature must succeed on a Constitution saving throw or have the spell dispelled for the next 5 minutes, or until the creature uses a bonus action to reactivate the spell's effects while the main duration has not ended.