Mind Swarm (Casual)

The "Mind Swarm" deck is fun to play because it has multiple paths to victory. At heart it's a black weenie deck that tries to quickly reduce your opponent's life total with aggressive flying creatures. It includes several excellent pieces of Equipment to enhance these creatures. But "Mind Swarm" also features a strong discard theme, and you can use these "hand destruction" cards to disrupt your opponents' game plans before they get going. Geth's Grimoire combines very well with these effects--every time you force opponents to discard a card, you get to draw a card. If you hit them with Wrench Mind, you may even be able to draw two cards!
For the midgame, the deck has a number of decent creature-removal spells. In general, save these for any creature that can stop your fliers from getting through (as opposed to, say, an annoying ground-pounder). It's fine to trade damage with your opponent. Use Leonin Bola to tap potential blockers or to stop opposing monsters from attacking you. If you have multiple untapped creatures and enough mana, you can even use Leonin Bola to tap multiple creatures in a turn; after one creature throws it, just pass it on for another creature to use.

A couple of cards excel in the long game. Relic Bane is a great source of long-term damage. Be sure to play it on an artifact that you won't use another spell to destroy--or an indestructible artifact. Skeleton Shard is a great way to recycle your creatures late in the game.

"Mind Swarm" is designed to play well against other Mirrodin-block decks, with many cards that work well against artifacts. If you come up against opponents playing very few artifacts, you can tune the deck a bit by removing Relic Bane and Emissary of Despair. Potential replacements include any creature with an evasion ability such as fear or flying. More creature removal, or even more discard effects if your opponent is playing a very slow deck, are also good additions. Whether you're squeezing with discards or flooding with weenies, the "Mind Swarm" deck can find a way to make life difficult for your opponents.[2]