Love the Boulder Toss joke! There are enough ideas there to put together a deck so I’ve made one available.

Treebeard: 18 HP, Blue Deck
2x Ents: 5 HP, Minor Orange+ Deck

3x Nasty Little Orc
A4*: If Treebeard did not move using the move die this turn, then this card’s value is 8 instead of 4.

3x ????

2x Boulder Toss
THROW BOULDER does 2 damage to a character Treebeard could attack at range. That character may not move on their controller’s next turn.

2x Furious Kick
A6: [same effect]

1x Entmoot
Draw 4 cards. For every space Treebeard has moved this turn, draw 1 less card.

1x Release the River!
Treebeard may not move until this effect resolves. At the beginning of your next turn, all characters in a straight line away from Treebeard receive 4 damage.

I dunno, this deck is fun but not very interesting. It’s an old school deck in that the cards work and use quotes and do what we expect Ents to do, but there’s no real deck theme here.

I’m thinking about some kind of “move and root” concept, or maybe a “build a wall then break the dam” concept. Lowbacca’s MIGHTY SWING card, that does more damage if you don’t move, might work here.

I’m pretty much on the same page as you. My only minor problems with this deck is it has a few “unfair” combos and cards. Like THERMAL DETONATOR is a pretty good card and it will be even more so in LOTRED and this deck has a card like BROKEN DAM to set it up; meaning Treebeard can inflict 6 damage to most (if not all) enemies and because of the high move of BD can avoid hurting his teammate.
I might suggest at least reducing the move on BD and maybe lowering BOULDER TOSS to 3 damage.

It’s also pretty easy to draw 5 cards with ENTMOOT unless you draw it late in the game. Maybe change it so Treebeard only gets one extra draw if at least one Ent is adjacent? That makes it pretty similar to a card Gothmog has.

Finally, I could complain about how GOING TO WAR is too similar to Isildur’s card and not very original (although the name is great), but it’s not a huge deal to me.

Also, I like the changes to Elrond!

Note that I’ve udpated Elrond to have more of an “action manipulation” theme. I haven’t tested that deck out and it looks very strong, but otherwise I’m happy with where it is landing. As for Isildur, I wouldn’t mind seeing better ideas, but his is a working deck as well. I’m satisfied with all 3 bad guy decks.

So once we finish this Treebeard deck, we’ve got a 6-set expansion, bringing this LOTRED set to 32 total decks. That’s a good number that allows for endless possible matches.