The grim reward box a party's first player-killer receives — containing only a book of kill-bounty PVP coupons.
A Savage Box is the loot box awarded to the first member of a party to gain a player-killer skull for murdering another crawler. To the recipient's disgust it contains no gear or gold — only a book of PVP-Coupons, one naming each member of the killer's own party, a payout offered for turning on one's teammates. Princess-Donut received hers after her forced kill in the Desperado Club and, like Imani-C before her, was disturbed enough to try to be rid of the coupons — Donut hiding Carl's under the tracks, Imani leaving her whole book on the first floor after failing to burn it.
The named coupon-kill reward is itself a Gold Savage Box among other prizes, making the box both cause and reward of crawler-on-crawler violence.
A loot box in the system's gold tier, opening to reveal a book of black skull-embossed coupons rather than treasure.
The system's insidious reward for the first betrayal — a box that hands a killer the tools to kill again.