Homebrew
0-level (Cantrip) Divination
You brandish the weapon used in the spell's casting and make an attack with it against one creature within 5 feet of you. On a hit, the target suffers the weapon attack's normal effects and becomes marked. Until the end of your next turn, the next attack roll against the marked target gains a 1d4 bonus.
At 5th level, the melee attack deals an extra 1d6 radiant damage to the target on a hit. This damage increases at 11th level (2d6) and 17th level (3d6).