buy teh haloz
Banned
You get 4 revives a day for each Warframe. They reset every 24 hours in real time, I believe at 12 AM GMT but I'm not positive. You can "buy" additional revives with plat for 4p a pop. You get this option when browsing the Arsenal. By the Warframe's name it'll say 4/4 or whatever you currently have. Those are your revives. Never buy them with platinum. If you run out, just take the mission failure or switch to a different Warframe.
Huh, revives are per Warframe? That's good to know.