Wait, what?
Sound ridiculous? You might think only blue can do megapermission, but thanks to an obscure old sideboard piece and a more recent combo piece, you can counter every single spell your opponent ever plays with nothing but forests.
The trick is comboing the long-forgotten Lifeforce with Painter's Servant. So long as the Servant is out, all spells are black, and Lifeforce lets you counter any black spell for a paltry two mana, even multiple times in one turn. Assemble these two and your opponent will likely never resolve another card for the rest of the (soon-to-be-over) game. I guarantee nobody expects a megapermission lock once they see you play a Forest!
Creatures
4 Arbor Elf
4 Chameleon Colossus
4 Overgrown Battlement
4 Painter's Servant
4 Vine Trellis
Spells
4 Avoid Fate
3 Compost
4 Creeping Mold
2 Desert Twister
4 Lifeforce
1 Vernal Bloom
2 Worldly Tutor
Lands
22 Forest
Vine Trellis and Overgrown Battlement help hold the fort until your combo is assembled, then help feed mana into Lifeforce once you do. Creeping Mold and Desert Twister let you wipe out anything troublesome that was played before you got your lock down, and Chameleon Colossus makes for an easy win once it has Protection from everything.
Avoid Fate is another surprise against decks that seek to blow up one of your combo pieces (it admittedly got much more useful when it was errata'd to counter instants) and Compost can earn you card advantage that will make any blue mage green with envy - note that it counts any card put into a graveyard, even ones not from play, so that includes anything you counter. Worldly Tutor fetches your Servant if you need to set up, or a Colossus if you're primed for the kill.
