You can enchant a permanent that is already tapped with Hold for Questioning
Its strong, and like most expensive spells needs to be evaluated in the knowledge that ramping artifacts to get to higher mana quantities is easier than doing it playing any color, barring perhaps green
Yeah, I have a job (now), but more income is always better, and I can use it to buy cards
Illustrators Puffygator, Joy Ang, Carl Critchlow, Ivan Shavrin, Rudy Siswanto and Ron Spencer provide their unique take on everyones favorite (or hated) creature type
On the other hand, power seems to go hand-in-hand with toughness, high CMC and having trample (if you know the game, that makes a lot of sense) The second principal component is pretty much whether a creature is more of a defensive or evasive kind of guy (vigilance, devotion to blue/white, flying) or more in the direct combat / aggressive direction (wither, deathtouch, devotion to red)
As a colorless Artifact that has a CMC of seven, it can add mana of any color once on the battlefield