The most powerful spell+rage combination - insta kill any lvl1-4 unit
 

I dont consider this really an exploit, but just a time saver, because once you imprisoned any enemy unit, you can kill him easily given preparation.

Ice Prison on enemy + Hildas Arrows....

The arrows should create mana/rage bubbles if they kill the enemy unit - now the game considers "killing the ice prison" as the same - meaning, the enemy below the ice unit will be replaced by a bubble.

Note that the ice shield is stronger for lvl3 and 4 units - so you have to damage it a bit - because hildas arrows doesnt do much damage.

You can basically kill 4 enemy troops at once with this if you have upgraded hildas arrows once.

http://i.imgur.com/4l6yW.jpg
http://i.imgur.com/iz3dc.jpg
http://i.imgur.com/atTxV.jpg
http://i.imgur.com/v7yUO.jpg

Have fun :)

I thought this was considered a bug?

Obviously a bug.

And the (bugged) pygmy is more powerful, reducing any stack to 1HP. Avenging angel (bugged) is also arguably stronger in a defensive capacity, reducing all damage taken to 1.

This is listed in the first post summary of the bugs thread

I fixed avenging angel and ftww fixed pygmy. Patches are on bugfix thread.