Cosmic Eye

Your eye darkens under the influence of the eldritch
madness, appearing as an endless starry sky. Make a
ranged spell attack, on a hit this eye fires a projectile of
eldritch energy that deals 1d8 necrotic damage. If you
score a critical hit, you can reroll any roll of 4 or lower on
the damage die until you get a higher result.

This spell’s damage increases by 1d8 when you reach 5th
level (2d8), 11th level (3d8), and 17th level (4d8).