Version 2.0, 3/17/2014
I updated this to have the slot numbers visible and increased the size of the spell name. The zip file includes both versions (version 1 has a "v1" in the file name) for those that want the older version without the numbers. The graphic file was unchanged.
The credit for the Magic: The Gathering icons go to Aridale Belmont and can be found
here.
Version 1.0, 2/24/2014
-Window created; includes all 12 slots