The Temple Runner calling card is part of the Rex Infernus Mastery Challenges, and it will require you to Master the Void Claw (the grapple hook). This side easter egg also provides valuable loot if you manage to complete it, so we'll show you what to do. From finding all six Mr. Peeks parts to starting and completing the grapple hook race itself, we've got you covered with this Rex Infernus side easter egg guide!
