Augury

2nd-Level Divination Spell (Cleric, Druid, Wizard)

Casting Time: 1 minute
Range: Self
Components: V, S, M (specially marked sticks, bones, cards, or other divinatory tokens worth 25+ GP)
Duration: Instantaneous

You receive an omen from an otherworldly entity about the results of a course of action that you plan to take within the next 30 minutes. The DM chooses the omen from the Omens table.

Omens

The spell doesn't account for circumstances, such as other spells, that might change the results.

If you cast the spell more than once before finishing a

A Long Rest is a period of extended downtime -- at least 8 hours -- available to any creature. During a Long Rest, you sleep for at least 6 hours and perform no more than 2 hours of light activity, such as reading, talking, eating, or standing watch.

During sleep, you have the Unconscious condition. After you finish a Long Rest, you must wait at least 16 hours before starting another one.

Benefits of the Rest. To start a Long Rest, you must have at least 1 Hit Point. When you finish the rest, you gain the following benefits:

Regain All HP. You regain all lost Hit Points and all spent Hit Point Dice. If your Hit Point maximum was reduced, it returns to normal.

Ability Scores Restored. If any of your ability scores were reduced, they return to normal.

Exhaustion Reduced. If you have the Exhaustion condition, its level decreases by 1.

Special Feature. Some features are recharged by a Long Rest. ... [more]

, there is a cumulative 25 percent chance chance for each casting after the first that you get no answer.

Source: Player's Handbook, p. 244