You "summon" a devil for bargaining

As part of the ritual you have to propose a deal (common ones being my firstborn son for power, or my soul for the life of my sick wife). If a Devil is interested in your proposal an imp will appear to have you sign a contract. This ritual is a pretty popular summoning ritual. But it actually is just a message sent through a connection kept open by the devils to find people willing to make trades. If the proposal meets the devils standard one will willingly appear at the place the incantation takes place to sign a contract. The devils have an interest in keeping the appearance that the ritual is actually a summoning to keep the "summoners" thinking they have the upper hand. Descriptions of how to perform this incantation are pretty common. They are propably put into librarys by devils themselves or their helpers (often times people who have a contract with a devil) to attract more people willing to make trades. Although most of the times the devil will get the better end of the deal in such a contract there are rumours of certain individuals who have tricked a devil into making a loss in such a contract.

Focus: None

Backlash: none

Material Component: A Newborn Mammal that has to be sacrificed as a part of the ritual.

Failure: 2 failed skillchecks in a row lead to a failure of the spell, if those 2 skill checks where the Knowledge (Law) checks you still summon a devil and pay the price you offer but don't get what you asked for because you made a horrible contract.