Tyche's Roulette

A flashing ball of light, about the size of a lime, flies toward your target: It rapidly changes color as it travels. Make a ranged spell attack against the target. On a hit, roll 1d6; the target takes 1d10 damage where the color of the projectile's light & type of damage is determined by the 1d6.

This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).