Follow your marker to the Pharaoh of Egypt. He'll have some tasks for you to prove your worth.
The first is a camel race around the Sphinx. Just fifteen markers and a generous time limit.
Just completing this first task is enough for a brick. Generous.
Task two is defeating fifteen enemies- mummies and scorpions, basically. Smash them any way you like, but Kamala remains a top brawler.
Winning the fight gets you another brick, and access to the real mission.