Clone Techniques wern't common. Tobirama created the Shadow Clone Technique and that was likely during the end of the Warring States Period, where most Uchiha awakened Mangekyo.
P1pham wrote: What if you had a clone perform the jutsu? Wouldn't this let you keep your vision and bypass the condition?
For Izanagi, it'd be useless. Only the clone would be affected by it, since Izanagi works only in one's personal space. If it was performed by a clone and the original was mortally wounded, the original wouldn't get revived. As for Izanami, it could work, but I doubt it. Such a heavy price can't be bypassed so easily. Naruto risked turning to stone during Sage training even when it was his clone that was supposed to petrify, as Fukasaku said. The clone's sensations are transmitted to the original, at least for the Shadow Clone Technique.
@Littlegen: Izanagi and Izanami have nothing to do with the Mangekyō, they're Sharingan techniques.
JOA20 wrote:
Izanagi and Izanami have nothing to do with the Mangekyō, they're Sharingan techniques.
Yeah, I just remembered. Brain fart.