Basic lands are literally free at any LGS or Grand Prix in the country
(You may cast it as a sorcery on a later turn without paying its mana cost.) Whenever you cast a multicolored instant or sorcery spell from your hand, exile that spell instead of putting it into your graveyard as it resolves
Rolling Temblor, Blasphemous Act, Divine Reckoning, and counterspells such as Dissipate are about the only ways* to reliably deal with an army of Spider Spawning tokens in the format
The life-to-mana conversion makes explosive turns possible, letting you chain demons onto the battlefield in a single push
While the combination of first strike and deathtouch makes it a pain to block, letting the Master of Cruelties through is even more dangerous
Any effect that can double damage is huge, and the speed that haste provides can help you to close out games