Flickering venom

Flickering venom was an invocation used by some warlocks, which could be used to infect an enemy with deadly poison. When a warlock casted flickering venom, they conjured a dagger-like weapon of venomous poison which they then shot into a creature within of them. The deadliness of the dagger was largely determined by the warlock's charisma but dark pact warlocks also gained a benefit from their intellect, which allowed them to stretch the reach of their attack from up to. Flickering venom was more easily cast than some spells, but required a short rest of a few minutes between castings regardless.