Quote Originally Posted by Tvtyrant View Post
There is a land taps for all colors at common that enters untapped for <>. This is significantly worse.
No there isn't. There are commons that tap for all colors and enter tap while requiring you to pay 1, and there's a land that taps for C that makes one mana of any color when it enters.

Quote Originally Posted by -D- View Post
Thoughts on this land:



Code:
Secret Laboratory
Land - Common
CARDNAME enters the battlefield tapped unless you pay U/B.
T: Add U or B.
It's a tap land that can sometimes filter your one color to the other color. That's very unimpressive, but it's still strictly better than the taplands, so it would be a fine uncommon.
I would make it 1 instead though.