UE4 Blueprint Random Float in Range node

Software:
Unreal Engine 4.18

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TheĀ Random Float in Range node generates a random float value between the Min and Max parameters.

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UE4 Blueprint Delay node

Software:
Unreal Engine 4.18

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The Delay node serves as a timer that will execute the connected blueprint after a predefined time in seconds.

An example of usage could be triggering a game event at a set time after the player entered a location.
You can use random values or other expressions connected to the Duration input to create a richer and less predictable interaction.