1. It's also nice with Fatty, who can throw in his awesome 1 wp to the quest if no enemies are revealed

I didn't even consider rally with allies that are discarded automatically! That makes the card a lot better! There are the eagles, the noldor guys, the outrider, the honor guard with valour, Beorn! You could use helm! Helm! Ride to ruin or the silvan abilities. Maybe even Damrod. Just saying...

And you know there are allies that want to leave play just to enter again: hello Silvan. My idea is to have a Valour deck (mono or mostly Leadership) on one side and Silvan deck on the other. At the right moment you play Rallying Cry to block with the likes of Galadhrim Minstrel, Naith Guide or Galadriel's Handmaiden, only to have them enter all the stronger next round.

By the way, would anyone care scanning and posting the Helm? It would be much welcomed.

Beorn with Rallying Cry is a confusing one because Rallying Cry says return it to its owner's hand " instead of placing it in the discard pile ", and Beorn is shuffled into your deck rather than discarded. But he does leave play. So I don't know if that would work or not.

The Raven-Winged Helm also sounds cool, but I'm less enthusiastic because the one instance where I really want to cancel damage is hero Beorn and he can't have attachments unless I manage to temporarily blank his text box.

Also I don't think the Helm would work with Erkenbrand as suggested above, because I think there was a ruling at some point that effects like Erkenbrand and Treebeard don't work unless they actually take the damage. If you cancel the damage, you have not paid the cost of their ability and it doesn't work.

And you know there are allies that want to leave play just to enter again: hello Silvan. My idea is to have a Valour deck (mono or mostly Leadership) on one side and Silvan deck on the other. At the right moment you play Rallying Cry to block with the likes of Galadhrim Minstrel, Naith Guide or Galadriel's Handmaiden, only to have them enter all the stronger next round.

By the way, would anyone care scanning and posting the Helm? It would be much welcomed.

True, but Silvan tends to have plenty of ways to pull allies back into your hand anyway.

Beorn with Rallying Cry is a confusing one because Rallying Cry says return it to its owner's hand " instead of placing it in the discard pile ", and Beorn is shuffled into your deck rather than discarded. But he does leave play. So I don't know if that would work or not.

The Raven-Winged Helm also sounds cool, but I'm less enthusiastic because the one instance where I really want to cancel damage is hero Beorn and he can't have attachments unless I manage to temporarily blank his text box.

Also I don't think the Helm would work with Erkenbrand as suggested above, because I think there was a ruling at some point that effects like Erkenbrand and Treebeard don't work unless they actually take the damage. If you cancel the damage, you have not paid the cost of their ability and it doesn't work.

With Rallying Cry, I would assume that it only applies to cards that are being discarded, though that might be a good question to send up to Caleb. I think you may also be right about the Helm on Erkenbrand, but it would still help with anyone wearing The Day's Rising, which is great.

Yes, Silvan are usually fine but still, it is not a bad utility to have. The card certainly grows greatly in power with more players as it works around the table.

I would say Beorn is not returned to hand because he wouldn't be discarded in the first place.

As for Beorn, Honour Guard works for him even if the Helm does not.

Ah did not notice that. Yeah so really its only good if you are going to chump block or discard allies yourself (like the eagles that discard after an attack etc) as you can't use it after a nasty treachery wipes your board.

Can only be used like this if you know something is coming with Henamarth or Palantir or whatever.

Yes, it still can. And there have been many instances when I knew (usually thanks to Henamarth, Denethor or Risk Some Light) that I would be losing allies due to a treachery I couldn't cancel.