Maligree's Wonderful Garden
The last resort of all Sourcerers.
By the time of Sourcery, the potency of the spell has diminished to the point where even the best wizard can only call up a Garden two feet wide. Coin the sourcerer restores the power of the spell, briefly taking up to eight hundred Wizards inside the Garden as a demonstration of his powers. He wistfully says he would like to go there again some day, and his wish is granted right at the very end, after Death has finally claimed the malevolent soul of Ipslore the Red, the true evil genius behind all the recent havoc.
It is said that all sourcerers who know the secret will go into the Garden in the end, and never come out again. Whether this is due to the realisation that the Disc cannot cope with them, to the fact that the Wonderful Garden is better than life, or to absent-mindedness is gracefully left to the reader's own reading...