Azuvius' Enveloping Ooze

You become instantly submerged in a thick, translucent slime that fills your space. For the duration, your speed is halved, you have advantage on all Constitution checks and saving throws, and you have disadvantage on all Dexterity checks and saving throws. In addition, you may use a bonus action to gain 2d10 temporary hit points (remember that any new temporary hit points replace and previous temporary hit points, including those generated by this spell).

When you cast this spell with a spell slot of fourth level or higher, the number of temporary hit points you gain with a bonus action increases by 1d10 for each level above third.