Pact of Water

''You clearly recite the terms of the pact, and fill a silver cup with water. Both subjects entering the pact drink one half of the cup, and the last few drops of the cup are poured into the dust. ''

You formalize a pledge between two living creatures, one of which can be yourself. A creature that violates the terms of the pact of water is struck with a curse of the choking sands (no save).

Both subjects of the water pact must be willing and fully informed of the terms of the pact; otherwise the spell has no affect. No creature can be coerced or deceived into making a water pact, but the terms themselves may be coercive - for example, party A pledges not to kill party B or any of his tribe, as long as party B delivers 10 silver pieces per month to party A. There is an old story of the desert in which a water cleric offers a water pact to a wanderer dying of thirst, in which the wanderer pledges himself into slavery in exchange for the half-cup of water.