Chaotic Form

You cause the form of a willing creature to become malleable, dripping and flowing according to the target’s will as if the creature were a vaguely humanoid‑shaped ooze. The creature is not affected by difficult terrain, it has advantage on Dexterity (Acrobatics) checks made to escape a grapple, and it suffers no penalties when squeezing through spaces one size category smaller than itself. The target’s movement is halved while it’s affected by chaotic form

. When you cast this spell using a spell slot of 5th level or higher, the duration increases by 10 minutes for each slot level above 4th.