Who did roman reigns face at wrestle mania 2014?

At WrestleMania 30 in 2014, Roman Reigns faced Brock Lesnar for the WWE World Heavyweight Championship. However, Reigns did not compete against Lesnar at this event; instead, he was part of a different match that night. Lesnar famously defeated The Undertaker in a historic match, ending The Undertaker's undefeated streak at WrestleMania. Reigns would later face Lesnar at WrestleMania 31 in 2015.