Prescience is the foreknowledge or foresight of events before they have happened. In powers, they usually develop a psychic or fortune teller. Often, the psychic does not with entire certainty what will happen, but is able to see fragments of the future or the most likely outcome from any action.
Please note that prescience is a restricted power, and will not be approved unless a player has previously spoken to staff and been given explicit permission to use it. This is one of those powers which is very difficult to run in a MUSH environment and would need to be worked out with staff first.
A limited version of this might be more along the lines of a telepathy-based danger sense, which might be permitted on-game. It should still be discussed with staff first.