Knights Contract

The Spirit Cannon is the last Witchcraft in which you can obtain. To unlock it, you must score an S-Rank on every episode, and beat the final boss, on Squire difficulty or higher. Note you must S-Rank each Episode all under one difficulty and defeat the final boss in order to unlock the Cannon; you cannot mix and match Episodes from different difficulties. If you haven't scored an S Rank in certain episodes, you must go back and earn an S Rank on them, and defeat the final boss again.

At the end of each episode, you'll be graded based on your performance in game time in that episode, a C grade being the lowest and the S grade being the highest:

• Time - The developers were very generous in terms of the time limit required for S-Rank. Even if you go out of your way to collect collectibles, as long as you don't idle, you will have no problem earning a S-Rank on the time for each level.
• Combos - Getting a S-Rank in combos is all about variety; scoring a lot of hits and the performing Finishers. If you're performing Finisher's and using Witchcraft's whenever you can, this will come naturally.
• Kills - As long as you kill every enemy you come across as you progress a level, you will get this easily. If you're planning to skip enemies for whatever reason, just make sure you only skip a few and not too many.
• Finishers - Performing Finishers is the best way to take down most enemies, so use it whenever you can. However, just performing one every so often will suffice.
• Retries - A retry is when you're taken to the "Continue Screen", not when Heinrich needs a revive. Note that by pressing "Yes" or "No" during the Continue Screen, the game will still register the fact that you had to retry. A neat trick to get around this is to quit to the XMB whenever you die and the "Continue Screen" is displayed. Load back up the game, and select "Continue". You will continue the game from your pervious checkpoint with no evidence of you ever dying. Thanks to Mitsuru Kirijo for the tip!