Corruption

Necromancy cantrip
Casting Time: 1 action
Range: Touch
Components: V, S, M (a bit of phosphorus)
Duration: concentration, up to 1 minute
Classes: Pale Master, Necromancer, Warlock, Wizard
You touch the ground beneath your feet to imbue it with a faint necrotic energy. This energy glows with a green dim light in a 5-foot radius. As a bonus action on your turn, you can cause the energy to travel through the ground centred on a place you can see within 30 feet of you.
Any creature other than yourself making an attack while standing on the corrupted ground must make a constitution saving throw against your spell save DC, on a fail, the creature's attack has a -2 attack penalty.
The distance you can move the corruption increases by an additional 10 feet when you reach 5th level (35 feet), 11th level (40 feet), and 17th level (45 feet).