A Reckoner Corpse

Acquisition
is acquired by killing a Reckoner Assassin, Operative, or Underboss.

Relinquish

 * can be Relinquished with Lore to upgrade the Lore. If the Lore is at maximum level, a Weapon (or Vitality) will be produced instead, depending on the Lore's consecration (or lack thereof).
 * Once, can be Relinquished with Temptation: Defiance to gain a mark of defiance.

and
may address Needs Grail and Needs Winter in Operations and Capers. Any use consumes the corpse at the end of the Action.

Remnant
may be offered as a gift to a Ligeian.