Leaflock is an impressive, easy-to-get ally. He has the standard advantages and disadvantages that all Ents share, and a special ability that is, to my mind, jaw-droppingly cool. He's the best of the Ents.
Like all Ents, Leaflock is playable at Wellinghall, the safest place on the map to acquire allies. And, like all the Ents except Quickbeam, he's limited in his range of movement to Fangorn and nearby regions--the same 9 that Treebeard can move to, which is three more than poor Skinbark. Those regions contain enough material for any MP-hungry player, with a number of 3-MP factions and ample sites for information and minor/major/gold ring items. The one drawback to these regions is that there's only one place to acquire major items: Moria. Leaflock works best--only works, really--in a deck designed to move in those regions. Ents in general are also limited in where they can fight--they cannot face auto-attacks or attacks keyed to a site. This is a very serious limitation--since many hazard creatures that are keyed to regions may also be keyed to sites, it effectively means that Ents won't be able to face many if not most of the attacks your company will be dealing with.
Ents were for a long time hampered by the fact that they were all playable at the same place. That, plus the fact that the Ent faction is playable there, made it impractical to play with more than a couple Ent-related cards. With the release of Dark Minions, though, and Fireworks, a deck with a greater focus on Ents becomes much more workable. Now, with a little bit more deck planning, you can insure that the site can be untapped in order to score at least a couple of Ents, and more if you're lucky.
Even if you don't want to commit to the cards that an Ent deck using Fireworks requires, and thus want to keep the Ent population in your deck fairly small, there's every reason for Leaflock to be your first choice. True, at 5 prowess and 8 body he's the smallest of the Ents--he won't be able to dribble orc-heads with his eyes closed like Treebeard or Skinbark. But 5/8 is the same as characters like Elrohir and Elladan--very respectable fighters. His special ability is what really takes the cake. He can tap to cancel the effect of a hazard. This is far more flexible, obviously, than simply being able to cancel an attack. Not only can it stop annoying one-shot hazards like corruption cards or Call of Home, it can completely disarm more complicated combos. LET your opponent play Doors of Night, Gloom, and Dragon's Desolation--it will all be for naught when Smaug is forced to take a hike. Or, if you know what's coming, cancel that initial Gloom and force your opponent to hold onto the rest of the cards, clogging up his hand. Multi-attack hazard creatures like Slayer and Assassin are also completely cancelled through Leaflock's ability--a fact that I've been thankful for more than once while sitting at Assassin-vulnerable Wellinghall. Like Torque of Hues, the threat of a Leaflock cancellation will deter your opponent from many possible courses of action, thus making life easier for you in ways you'll never fully know. The only character or ally out there with a comparable ability is Tom Bombadil. Tom's ability does have one edge over Leaflock's--Tom can cancel a hazard against any company in his turf, while Leaflock's ability is limited to his own company. That's a big difference, if your deck tends to use multiple companies, but it speaks more to the incredible power of Tom than to any deficiency in Leaflock.
Leaflock still won't see as much use as Quickbeam, because of his limited range of movement. But in decks designed to hang out in Ent country, there's no Ent worth having more.
[Archivist's note: Finglas translates as hair-leaf in Common Speech]
Original card review taken from : http://fan.theonering.net/morgulrats/
With the authorization of the webmaster.
The reviewing team consisted of Gwaihir (Chris Farrell), Gimli (Nathan Bruinooge), Ohtar (Charles E. Bouldin, Esq.), Radagast (James Kight), Joshua B. Grace (Beorn), Martijn Steultjens (Fram Frumgarson), Jason Klank (Saruman) and Jeffery Dobberpuhl (Wormtongue)