To install the MTG Game Definition, add the OCTGN Game Directory to your list of Game Feeds. Paste this URL into the ‘Add Feed’ window inside Games Manager: https://www.myget.org/f/octgngamedirectory
These are the image packages you need in order to view the actual card images in-game.
All sets prior to Return to Ravnica Block – This is a magnet link to a Torrent, which should automatically load your default Torrent client when you click it. Currently, torrenting is the only method to obtain these older images due to its large size (~4 GB). THE IMAGES ARE ORGANIZED BY BLOCKS!
Additional image packs not in the torrent (direct downloads):
Tokens Update Pack 2 (updated September 6, 2013) — adds tokens to all sets prior to Return to Ravnica. Newer sets come pre-bundles with tokens.
Planes & Schemes Update Pack 1 NOTE: Install this pack AFTER you install the Torrent packs. Updates planes & schemes cards to appear larger in-game and rotated properly.
Magic Origins (LOWRES) (JULY 7 2015)
Theros Challenge Decks v1 (JULY 1 2015)
From the Vault Annihilation v1 (JULY 1 2015)
Duel Decks: Elspeth vs Kiora v1 (JULY 1 2015)
Commander 2014 v1 (JULY 1 2015)
Dragons of Tarkir v1 (JULY 1 2015)
Vintage Masters (Low-Res)
Special thanks goes out to the folks at http://www.slightlymagic.net for their amazing high-resolution card scans!