But what if players say “I attack in random directions!” or something like that?
Turns out I wouldn’t be so harsh as I suggested. I’d use a variant of the same random target rule I talked about in the ranged attacks post and the post on random spell targets.
Roll 8d6, with one die being a different color. If the unique-colored die is the highest result or ties with the highest result, the attack is in the right direction. If not, the character swings at empty space.
Multiple characters attacking random empty space use the same procedure, which means more chances of scoring a lucky hit. If they are standing back to back, two characters each roll 4 dice + 1 different-colored die, three characters each roll 2 dice + 1 different-colored die, and four characters roll two dice of different colors.
If the creature is hit, then just like Chicagowiz’s example, everyone can make normal attacks without the random target roll until there’s a round where no one successfully hit the invisible opponent. After that round, attacks revert to the original random procedure.
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