https://www.polygon.com/2019/1/21/18191510/mortal-kombat-11-geras-moves-explainer

When NetherRealm Studios unveiled Mortal Kombat 11 last week, the game’s brand-new character, Geras, might have looked like a fairly standard grappler. He’s armed with a few familiar Mortal Kombat-style teleportation and freeze moves, plus the ability to manipulate stone and sand. But Geras is easily the game’s most intriguing character, thanks to his ability to manipulate time — including the power to influence the in-game timer.

One of Geras’ abilities is called Lost Time and Spare Time. It consists of two moves: Lost Time, which subtracts up to 30 seconds from the clock, and Spare Time, which adds 30 seconds to the clock. Lost Time has some restrictions, naturally. Geras can’t remove the final nine seconds of the match, even if the timer is already under 30 seconds.