If you spend a turn playing Waste Not, thats extra time your opponent has to get a threat on the field before you can wipe away their hand
And, if that wasn't enough, this ability can be activated more than once
That's still fine and dandy, just like candy, but it's not as broken as Tinker from a mana rock into a Darksteel Colossus or the Spike version of that with Sundering Titan
Almost all the usual answer cards in the other three colours work just fine on this thing and so it is something you want to include as part of a toolbox of threats
Mystery Booster 2 is brilliant
This is based on cards being sold for their market value, rather than one-of-a-kind exceptions like PSA 9/10 cards from Alpha and other older sets, for example