Caustic Reach

You take a modicum of acid and germinate it to produce a culture that symbiotically attaches itself to you. The acid remains there for the duration and harms neither you nor your equipment, as it is considered to be an elemental extension of yourself.

Corrosivity. Naturally caustic, over the span of 1 minute, the acid can dissolve 1 foot of common wood, 1/2 foot of common stone, or 1 inch of common metal. The spell ends if you attack with the acid, if you dismiss it as an action, if you attempt to dissolve a material over 1 minute, or if you cast it again.

Acidic Spatter. You can also attack with the acid, although doing so ends the spell. When you cast this spell, or as an action on a later turn, you can blast the acid at a creature within 120 feet of you. Make a ranged spell attack, if hit, the target takes one bracket of acid damage. If the target hit within a 30 ft range, they can take 3d4 acid damage. If the target is hit within a 60 ft range, they can take 2d4 acid damage. If the target is hit within a 120 ft range, they can take 1d4 acid damage.

Cantrip Upgrade. This spell's damage increases when you reach 5th level (6d4, or 4d4, or 2d4), 11th level (9d4, or 6d4, or 3d4), and 17th level (12d4, or 8d4, or 4d4).