From Final Fantasy XIV A Realm Reborn Wiki
Sleeve Draw is an action unlocked by questing at level 70. It's available for Astrologian.“
Draws a card (arcanum) from your divining deck and grants two stacks of Sleeve Draw.
- Duration: 30s
- Sleeve Draw Effect: Using your drawn arcanum consumes a stack of Sleeve Draw and draws another card.
— In-game description