Now that m12 previews are coming out, I found an interesting creature which might fit into the deck. The only problem is the casting cost which is at 3 but you've got a creature with hexproof (troll-shroud) as well as power that increases everytime we land a forest.

Dungrove Elder - 2G
Creature - Treefolk (R)
Hexproof
Dungrove Elder's power and toughness are each equal to the number of Forests you contorl.
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Any thoughts on this one?

Cheers.