options you have, but it's important to try to leave at least UR mana open  whenever possible. An important suggestion: unless you play Delver of Secrets first turn, you should always play or fetch Mountain first. This way, if you topdeck Thunderous Wrath, you have the option to use it immediately. The sideboard Building and testing this deck, I've created the sideboard based on walls I've hit and opportunities for optimization. That said, no sideboard is perfect; it needs to be customized to your local metagame. If you routinely face control decks, you may wish to permanently swap some of the mainboard options out in favor of long-term card advantage generators. If rush aggro is all the rage at your LGS, you might as well run anti-beats tools right off the bat. Aggro matchup: Against the fastest decks (zombies, white weenies, etc.) cards like Rewind,  Forbidden Alchemy, and Think Twice are too slow to be of any real use. You still need your faster creatures and burn spells, but dropping in Slumbering Dragons and additional firepower will help. A single Slumbering Dragon can frequently deter entire enemy forces, and there's nothing more hilarious than an opponent waiting for a fatal swing, only to eat a Magmaquake (that leaves your now gigantic dragon unscathed). Pillars of Flame are perfect to exile zombies, and Electrickery is highly efficient versus goblins, spirits, and mana dorks. Try to save your counters for game-ending non-creature threats, and use Cyclonic Rift to disrupt enemy tempo. Remember