For Ascension level 9, you need to reach level 11500, kill 1500 NPCs, defeat 700 bosses, deal 1000 billion damage, and use your abilities 1500 times. You also need to clear Rune Dungeons (Hard) 10 times, Shadow Dungeons (Hard) 10 times, and complete 15 Medium+ Boss Rush runs.
On top of that, you’ll need 2 Azure Hearts from the Yamato boss on Judgement Island, and 2 Evolution Fragments from the True Aizen boss in Soul Dominion.