Tomb of Glory is a rather classic attack-wave-gauntlet style dungeon.

After an initial waiting period of about 30 seconds, all players move into the center of a pyramid-shaped tomb, into a low pit. Soon, wave after wave of enemies will come into the center of the pyramid and attack, and there will also be a total of 4 bosses during this. Each boss will also give a loot roll when defeated. This is one of the simplest and most straightforward instances to do: Go to the center, stay there, kill everything. The enemies also give rather decent boosts to Soul Energy when killed, so you should be able to use your Soul attack rather frequently.