You can either generate a pile of red mana based on an opponents hand size or exile the top three cards of your library and play them that turn
You can feed all this mana into generic mana costs, X-spell costs, or, with Chromatic Orrery out, use it to cast whatever you like
(The next time that creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.) Illustrated by Quinton Hoover Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
Here's my quick list of notable reprints for Commander: White: Ghostly Prison Blue: Show and Tell, Desertion Black: Phyrexian Arena (new art!) Red: Gratuitous Violence Green: Beast Within, Berserk, Birds of Paradise, Burgeoning, Explosive Vegetation Colorless: Horn of Greed (first foil printing!) Multicolor: Exotic Orchard Next Up: Budget Commander
The prize
Flickering it is especially amazing