Copy the edited spell into your "override" directory; this will bring the spell into the game. However, since Dimension Door is not a spell normally accessible in the game, you'll have to use Shadowkeeper to give it to your mage. Shadowkeeper is available
here.
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An intelligent mind is the key to the universe.
The most distressing thing about practicing magic is the fact that even the most learned sorcerers cannot accurately describe what magic *is*....