Venom Slash

You touch a dagger and imbue it with venomous energy. If that dagger hit's an enemy it deals 1 extra poison damage and applies 2 venom stacks, after it hits, the effects of this spell ends

At Higher Levels: The number of venom stacks applied increases by 1 when you reach 5th level (3 stacks), 11th level (4 stacks) and 17th level (5 stacks)