Illegal formation

[aaaxooo]

There are no illegal formations nowadays.

Yea. But you still get the big red "!" if you use them

[talisman]

Yea. But you still get the big red "!" if you use them

No, the big Red '!' is to warn you the formation is unbalanced in some way, not as a notification that the formation is illegal.

[aaaxooo]

Yes yes that's what I mean