I think it would be in game in combat, but can somebody answer this question in the context of rp (unless I’m wrong about the context of combat) only?
The durations for spells and abilities are always "in game" time. D&D never counts real world time for anything.
A combat round lasts for six seconds of in-game time, so something with a one-minute duration lasts for ten rounds in combat. The vast majority of combat encounters do not last more than three or four rounds, so it's usually safe to assume a one-minute duration will see you through to the end of a fight.
The Hexblade's Curse feature is indented to be used mainly in combat, but it could be used out of combat too.
We have this from the 2014 PHB for tracking time (Chapter 8: Adventuring)
Time
In situations where keeping track of the passage of time is important, the DM determines the time a task requires. The DM might use a different time scale depending on the context of the situation at hand. In a dungeon environment, the adventurers' movement happens on a scale of minutes. It takes them about a minute to creep down a long hallway, another minute to check for traps on the door at the end of the hall, and a good ten minutes to search the chamber beyond for anything interesting or valuable.
In a city or wilderness, a scale of hours is often more appropriate. Adventurers eager to reach the lonely tower at the heart of the forest hurry across those fifteen miles in just under four hours' time.
For long journeys, a scale of days works best. Following the road from Baldur's Gate to Waterdeep, the adventurers spend four uneventful days before a goblin ambush interrupts their journey.
In combat and other fast-paced situations, the game relies on rounds, a 6-second span of time.
I think it would be in game in combat, but can somebody answer this question in the context of rp (unless I’m wrong about the context of combat) only?
The durations for spells and abilities are always "in game" time. D&D never counts real world time for anything.
A combat round lasts for six seconds of in-game time, so something with a one-minute duration lasts for ten rounds in combat. The vast majority of combat encounters do not last more than three or four rounds, so it's usually safe to assume a one-minute duration will see you through to the end of a fight.
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Thank you, and have a nice day
The Hexblade's Curse feature is indented to be used mainly in combat, but it could be used out of combat too.
We have this from the 2014 PHB for tracking time (Chapter 8: Adventuring)
And there are also some similar/updated guidelines in the 2024 DMG: Tracking Time.