Magic Dashboard

Command Tower

{T}: Add one mana of any color in your commander’s color identity.

Rarity : Common
Types : Land
Artist : Ryan Yee
Flavor : When defeat is near and guidance is scarce, all eyes look in one direction.
Cost converted to mana : 0

Rulings

22 September 2011
The color identity of your commander is set before the game begins and doesn’t change during the game, even your commander is in a hidden zone (like the hand or library) or an effect changes your commander’s color.
22 September 2011
If your commander is a card like Kozilek, Butcher of Truth that has no colors in its color identity, Command Tower’s ability produces no mana.
22 September 2011
In formats other than Commander, Command Tower’s ability produces no mana.

Kalemne's Captain

Vigilance {5}{W}{W}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) When Kalemne's Captain becomes monstrous, exile all artifacts and enchantments.

Dualcaster Mage

Flash When Dualcaster Mage enters the battlefield, copy target instant or sorcery spell. You may choose new targets for the copy.