Drop of Death

As you speak words of arcane power this spell imbue your finger with a drop of a poison most insidious. The poison can only come into its true effectiveness when put into food or drink; it has no effect when smeared on blade or flesh. A creature that consumes food or drink tainted by this poison shows no immediate side effects but must make a Constitution saving throw.

In the next hour they will begin sweating, the hour after that intense vomiting, reducing their movement speed by half; hereafter they are poisoned. During the hour after that they begin taking 2d4 poison damage every minute (for the full hour); if they succeeded on the initial Constitution save they only take half damage. Once in the system this poison can only be stopped by a lesser restoration cast at the same level. If the spell is cast at a lower level the caster must make a check using their spellcasting ability equal to 10 + the level this spell is cast at.

The poison can affect up to a single gallon of water or a pound of food before becoming too diluted to work; it is colorless and scentless, but a successful Wisdom (Perception) check against your spell save DC will reveal a slightly odd taste. The poison degrades and becomes useless if not consumed within 24 hours.

At Higher Levels:  When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d4 for every two slot levels above 5th.