From Final Fantasy XIV A Realm Reborn Wiki
Spread is an action unlocked by questing at level 40. It's available for Astrologian.“
Add the currently drawn arcanum to your spread where it is kept indefinitely. Execute again to use the card.
- Recast timer cooldown will begin once the held card is read or returned to your deck.
— In-game description
- Spread allows the Astrologian to "hold" a card, to put it aside for later use. For example, if the Astrologian wanted to combo a Royal Road AOE with a The Balance card, but, obtained The Balance before the effect could be in place, "holding" it with Spread will put The Balance aside until the proper Royal Road effect was in place.
- It should be noted that the Astrologian can Draw a card that is currently being held with Spread.
- An effective strategy for Duty Roulette is to prepare a card- combo while waiting for the group to be set up, allowing the Astrologian to go in with a buff that can increase damage or defense by using Royal Road and Spread. This would make the first encounter much easier while they adjust to the new group's make-up.