On this page of the guide to Immortals Fenyx Rising, you will learn how to complete the next main mission, which is called Passage in the Abyss. This is a continuation of the previous quest; you will now have to complete the challenges within the Vault of Tartaros.
After a cutscene finishes, you will find yourself in the middle of the Vault. Go forward, then hold the jump button in order to jump higher, which will allow you to proceed further.
Afterwards, pull the lever which is located in front of you and jump onto the platform that has been activated by it.
Interact with the lever again, so that new platforms appear on the right side. Jump onto them and reach the next lever. Interact with the new lever. This will activate yet another platform, which will slowly move towards you. Jump on it and wait for it to reach the end of its path.
There is a chest near the next lever, open it to gain a few potions. Then activate the lever and descend to the bottom on successive platforms. Now head upwards, using all possible platforms.
At the top you will find the Wings of Daedalus, they will allow you to perform double jumps. Use your wings to get to the other side and then pick up the axe located there. The axe is ideal for fighting larger groups of opponents, it also deals damage to stamina. Unfortunately, it is significantly slower than the sword.
After acquiring the axe, there will be a short cutscene, after which you will be attacked by opponents. This is the perfect occasion for a test of your new axe. A new opponent with a shield will join the fight, attacks with a sword will be completely ineffective against him; you need to primarily use the axe to defeat him. After defeating the foes, go to the next room.
For the final stage of the mission, you have to step onto a pressure plate with a soldier's helmet symbol. Wait until the first platform approaches you, then quickly jump onto it and wait until it reaches the second platform. Continue to navigate the platforms until you reach the very top. There you will find the first of Zeus's lightning. After you pick it up, you are done with the mission and you will transported back to the surface.