Ancient Hearts

From the White Wolf Wiki, the most complete White Wolf reference

Ancient Hearts was an expansion set for the Vampire: The Eternal Struggle trading card game, released by Wizards of the Coast. It added ancient vampires, many from the Middle Eastern World of Darkness, to the Jyhad, most notably Kindred of the Assamite and Followers of Set clans.

Among the new rules added were Contracts, which were calls for a vampire to be exterminated that allowed an Assamite to attack that Minion at any time, and Corruption, counters which represent the Setites' ability to slowly erode the loyalty of opposing Minions.