Attire of the Pact Keeper

This piece of clothing were made from and unknown material and enchanted with magic belonging to creatures of the beyond. These clothing are normally created or given to people who have made a bargain with otherwordly entities and some of their magic lingers within. While attuned and wearing this item you are under effect of the mage armor spell. In addition, you gain the following:

• This attire becomes your arcane focus and you gain +1 to spell attack rolls and to the saving throw DCs of your warlock spells.
• You gain 1 eldritch invocation of your choice (selected only once after you attuned to the item and it cannot be changed any time after words even if you unattune to it)

Notes: Bonus: Ranged Spell Attacks, Warlock