Alchemical pact
From the White Wolf Wiki, the most complete White Wolf reference
An alchemical pact is a mystic bond which can be established between members of a Promethean throng. The physical sign of the pact is the Brand, a mark made on the skin with Pyros, enabling each of the Prometheans involved to donate small amounts of their Pyros to the other members of the pact.
If members of the same Lineage make a pact, it assists in the practice of their Transmutations, but spreads the influence of their Wasteland. If members of different Lineages make a pact, it mitigates the effects of Disquiet in others.
- PTC: Lexicon from Web spoiler, July 21, 2006
