Elves, Treefolk, and the very soul of the forest itself resist attempts to stripmine and harvest all the resources, not knowing the tragic fate that awaits them (spoilers, for a 25-year-old plot point I guess.) The final act depicted in the art of the set is that of the end of the war, when the apocalypse is about to, or has come
Cards like Mirror Image are thematically perfect and have art that matches great with the deck, but they also enable you to drop two or three sea monsters in a single turn
I mention it only because there arent yet enough cards that bring things back from exile to warrant me playing the card
Elven Farsight - Thats one hell of a spell for just one mana
Another problem that Pillow Fort decks typically run into is mass board resets like Cyclonic Rift, Austere Command, Bane of Progress and the like