Endurance Pack
From WikiRaider
Endurance is an Expedition Card Gift in Rise of the Tomb Raider.
Like all gifts it can be found if you choose "Marketplace" from the main menu and switch to the tab "Gifts".
This particular pack is received by purchasing the Endurance Mode add-on individually or as part of the Rise of the Tomb Raider Season Pass.
Cards
The pack consists of 20 foil cards that can not be sold.