Caelestra's Armrings

Wondrous item, very rare (requires attunement by a spellcaster)

This pair of platinum arm rings evoke the appearance of feathered wings attached to the wearer's elbows, and they are scribed with gravity-altering magical runes. They once belonged to Caelestra, a member of the Obsidian Synod

While you wear the arm rings, their magic increases your mobility significantly. Your movement speed increases by 10 feet if you are not wearing armor, you have advantage on all Acrobatics checks, your jump distance is doubled, and you have resistance to falling damage.

Additionally, any weapon you wield while wearing the arm rings has the Thrown(30/60) property (if it already had the Thrown property its range is doubled), and returns to you after you attack with it. By spending a spell slot as part of a thrown attack, you can ricochet the weapon between a number of additional targets equal to the level of the spell slot spent. Make a separate attack roll for each target.

Garb of the Synod

If you have several items that belonged to members of the Obsidian Synod, you can attune to all of them using a single attunement slot. You gain benefits depending on how many items you have equipped:

1 item: The Gift of Alacrity and Magnify Gravity spells are added to your spell list.
2 items: The Pulse Wave and Gravity Sinkhole spells are added to your spell list, and you can cast Disguise Self at will. You can use the spell to perfectly take on the appearance of any Synod member whose item you are attuned to.
3 items: The Temporal Shunt and Gravity Fissure spells are added to your spell list, and when you use your final spell slot of sixth level or lower, roll a d6. If the number rolled is the same as the level of the spell slot you spent, you regain one slot of that level.
4 items: The Dark Star and Reality Break spells are added to your spell list, and you gain a +1 bonus to spell attack rolls, and your spell save DC increases by 1.