The Necronomicon

Instructions
Things to note: Taint doesn't kill (removed if down to 1 life). Sanity goes to -10 only, and cards can still be used. Roll mouse over insanities to see what they do. Creatures only counter attack after you're hit. They don't attack direct. Mouse control. Select a card then hit the centre button to play that card. Cards cost sanity to play (green number in the bottom right) - if you run out of sanity then you will go insane.

Each round the computer will go up one rank. Your rank increase is determined by your score. Score well in a round to increase faster in rank. Cards are unlocked every couple or so levels (not every level). Defeat your opponent by reducing their Life to zero. Sanity can be increased by Discarding sanity costing cards instead of playing them.
When you go insane, if you don't know what an insanity effect does, roll your mouse over the insanity icon.