Proving Ground

Proving Ground is unlocked by defeating Mordekaiser in the Death Realm Sanctum and the teleport orb for it is located in the second hall of the Darkin Temple.

It is an arena in which the player fights _ waves of enemies. Each wave is only one enemy type. After killing all the enemies, the next wave starts.

The waves are as follows:
 * 1) 10 Implings
 * 2) 5 Golems
 * 3) 8 Skeletons
 * 4) 6 Implings (Elite variant)
 * 5) Justicar
 * 6) 3 Golem Queens
 * 7) 8 Knights
 * 8) Demacian Noble
 * 9) 3 Impling Champions
 * 10) Boris
 * 11) Behemoth
 * 12) Boris, the World Ender
 * 13) 2 Justicars
 * 14) Aatrox
 * 15) 5 Behemoths
 * 16) will finish later