This is a very good tool – good job!

On my computer I created a similar tool, and from my experience I’d make some suggestions:
- milder colors are better for the readability. The currently used colors are either too dark or too strong. Although there is no better substitute for the red (much to my regret), for all other colors there are less strong, or brighter, varieties though.
- I’d recommend to color-code ONLY the C column (the tier levels). Much better for the eyes.
- repeat the faction on every tab (f.e. Spells – Demon, Heroes – Orc, and so on)
- out of print cards should be tagged, f.e. by using italic font.
- the description should be consistent with the game (not ‘Cards’ but ‘Units’).

Other than these mior things I’d say it meets all requirements for a quick overview and count!
Well done!

nice