I've updated the Arena.
Changes: Removed the badge of courage, spirit of despair, and the +2 speed cloak. Removed the tavern. Reduced the neutral army by 5 trolls and reduced the number of wizards from 12 to 9.
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I'm also considering making all three columns of artifact collections have 3 artifacts each, but with different levels (1, 2, and 3) in each column, instead of having 3 artifacts of levels 1, 2, and 3 respectively. The idea is that this would make it more interesting.
If the stats are too high, they can be reduced in the bonuses, for example, from +6 to +4.
Also, the stack size in the army needs to be increased if the bonuses are not changed – if I understood the video correctly.

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