In Mortal Kombat X the Krypt contains tombstones that need to be purchased with Koins to unlock Fatalities and Brutalities.
This video is a walkthrough of the Krypt and shows you how to find all the items that are necessary to unlock all of the areas in the Krypt and in the process, earn over 50k Koins.
Raiden's Staff - Shadow Spiders Kave (5,11)
Reptile's Claw - Widow's Pass (6,30)
Switch Passage - Code 4,1,3,2
Kotal Kahn's Sword - Kotal's Kave (22,34)
Kenshi's Katana - Shadow Spider's Hive (5,40)
Kung Lao's Hat - Chamber of Bones (-7,12)
Scorpion's Spear - Walkway of Souls (-13,19)
Sub-Zero's Iceball - Frost Path (-21,20)
Spider Gem - Scorpion Pits (18,10)
Liu Kang's Fireball - Shao Khan;s Tomb (0,6)
Ermac's Medallion - Dark Pass (-5,18)
Jax's Rocket Launcher - Kahn's Stronghold (0,12)
Netherrealm Kamidogu - Shrine of the Dead (-11,13)