Good way to get your Mana Vault untapped w/o 4CMC or takin' the 1. Give your Darksteel Colossus Vigilance...almost. Untap your opponent's Trinisphere if they untap it during their turn ^^

  -- By Jay from Minneapolis, MN USA on January 30, 2011

Eerm, scratch that last comment about the Mox Opal; didn't realize it's a legendary artifact. Even so, I think this combo with prototype portal, among many others, is still going to be amazing!

  -- By Brendan from Dallas, TX on September 15, 2010

Will be amazing with scars of mirrodin. Combo this with prototype portal and Mox Opal and you'll be able to effectively double your mana pool every turn if needed. I can see this seeing play in standard

  -- By shanghaied from Dallas, TX on September 15, 2010

Metalworker was always my fav for the key. Good thing alara rotates out or esper would get some NASTY tricks w master transmuter and artifacts w comes into play abilities. Im kinda shocked to see this reprinted--wasn't this actually banned in some formats like legacy? Im not complaining though. Time to shake the dust off these keys!

  -- By Dinosaur from Capron, IL on July 18, 2010

ROFLMFAO at the guy who said VOLTAIC KEY was horrible! This is an amazing card, always will be, and its very fun in the P vs TC decks. Try it out with the worn powerstone, or as already stated the phyresxian colossus, I already have rthe deck and use these with icy manipulators for some real fun lockdown :)

  -- By Tony from Canada on March 22, 2010

This+Timevault= infinite turns

  -- By badgerlord from badgerland on June 23, 2008

Nice Card. Besides the Colossus combo, untap oh I don't know mill stone or better yet Basalt Monolith.

  -- By Brendan Blaney from Fort Bragg, CA on April 06, 2008

Wow what a bad card. The guided lotus combo really hacked me off.

  -- By Anonymous from Denver, CO USA on March 12, 2008

Except uhhhh... how are you gonna keep untapping your key? You can get 13 mana with 4 voltaic keys out.

  -- By SeedlessTom from Hammond, IN on September 13, 2007

gilded lotus and volatic key. oops infinite mana.

  -- By Anonymous from Springfield MO USA on March 19, 2007

This is a perfect combo to put together with Phrexian colossus if you also play dueling grounds with it the colossus will be unstoppable as a 8/8 creature that can't be blocked and can be untapped without paying 8 life. just hope that your opponent doesnt have disenchant :P

  -- By Anonymous from ny, ny on September 29, 2002