in the glossary:
Painful Screech: Instead of making its normal attack or attacks, this character deals 10 damage to all characters (enemies and allies alike) up to 3 squares away. Using this special ability is not an attack and does not require an attack roll.

on Demagol's card:
Counter Push 2 (Force 2, usable only when this character takes damage: range 6; 20 damage; push back target 2 squares if Huge or smaller)


Demagol and 2 Ghhhks are in the same squad. Both Ghhhk is within 3 squares of Demagol. An enemy Admiral Yularen is 4 squares away from Demagol. I activate one of my Ghhhk, and use its Painful Screech. Yularen isn't in the ability's range, so he doesn't take damage, but Demagol takes 10 damage. Because he takes damage, I can use his Counter Push 2 Force power, target Yularen, and cause 20 damage to him. Yularen pushed back 2 squares, but it is still within 6 squares of Demagol. I do the same with the other Ghhhk, and I kill Yularen with Demagol's Counter Push.

Can I do this? Is this legal? Or Counter Push is usable only when that character takes damage from an enemy? I think this should be in the glossary...

i do not believe you ould be able to affect yularen in your example, because counter push happens after the screech has resolved. As to the idea of counter pushing your own ally, i am not sure.

That is a very clever idea! Based on wording I don't see why it couldn't work unless there is clarification that Counter Push must target the source of damage.