Etch

You touch a non-stone surface no greater than 1 square foot in size and summon a shortlived acidic strand of ooze. The ooze burns away at the material and etches whatever you wish permanently into it, such as words, symbols, or art.
If the surface is a creature, the creature must attempt a Constitution saving throw or take ld6 acid damage. Scars left by the acid can be removed using a lesser restoration spell