>reach 150
>get to that rank
> click claim
This is such a dickheaded answer lmfao. You don't even need to be 150 to get these rewards. The ss shows them being level 150 anyway. Not sure why you commented here with this idiocy.
Anyways, you need to do the Summer reawakened quest line (its very short) to gain access to Primal World. From there buy Arcane Sky Pills from God's Giving (These increase your vitae to rank through your boundaries, Arcane, Mirage, Astral and Shifting sky). As you increase them you can claim those items from the chest. All the npcs you will need to visit in order to do this will be in primal world after you've finished the Summer Reawakened questline.
Tip: Do not autopath, some autopath routes take you to an npc thats far away thats actually really close to where you teleport in
Hope this helps