ThunderCats (1985)

S1E7 Trouble with Time

As the Thundercats face dwindling supplies of Thundrillium, they embark on a quest to find more. Tygra discovers a significant deposit hidden in a cave and decides to explore it. However, he unwittingly steps into the Cave of Time, where anyone who enters experiences accelerated aging until they perish. Tygra's only chance lies in Cheetara's incredible speed, which he hopes will be sufficient to counteract the cave's deadly effects and rescue him before it's too late.