
At the time, I believed that Planescape was created just so that all this stuff that was out there would be "playable." Most people didn't play high-level games, quitting before they reached high enough levels to venture to the planes. One of the big selling points was "you can go to the planes at 1st level!"Jhaelen said:Part of the reason was the difficulty of traveling to those planes and an even bigger part was the difficulty of surviving there once you got there. Besides I always found it difficult to think of a reason why anyone would want to go there.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.