Quicksilver Form

Once per short rest, as a reaction or bonus action the character can become a liquid wave of quicksilver. It remains in quicksilver form for up to one minute. While in quicksilver form, the character cannot attack or cast spells, ignores difficult terrain, doesn’t provoke opportunity attacks, and cannot interact with objects. It cannot fly, but it gains a climb speed equal to its walking speed. It can flow through any aperture a Tiny creature could fit through. The character can return to its normal form as a bonus action on its turn.