Wrenn and Realmbreakers +1 loyalty ability turns a land you control into a 3/3 Elemental creature with vigilance, hexproof, and haste until your next turn
In particular, these creatures allow you to play to the board while developing your mana at the same time - many other designs (such as tapped lands) only make mana and you tend to fall behind in order to fix your mana
Its glitzy and fun, and its satisfying beating players with their own cards but still not really worth it
Demonic Consultation was a very interesting sort of Demonic Tutor
Looks aren't everything, though - a lack of power and the relative availability of this card keep the price fairly low
Jidoor, Aristocratic Capital Another Traumatize variant, but this time on a land card