There's also another interesting thing. When harpies attack dendroids and the dendroids fight back, the harpy gets bound, flies back, and remains standing, bound, far away from the dendroid.

So, what's the most interesting thing that happens next?
A monster bound to the roots of a dendroid can only attack those standing around it or defending... but a harpy bound far away from the dendroid – will it be able to fly again and attack it or another unit? ... or will it wait for someone to approach it closely or for the roots to be removed?
P.S. By the way, since the harpy has a speed of 6, and the dendroid has a speed of 3 or 4, the dendroid won't be able to reach the harpy bound far away from it in one turn, and if it just approaches, the roots will automatically be removed from the harpy, and it will fly away. :)