We wanted a card that represented the manufacturing of weapons, and we liked having it tied to an artifact strategy
Finally, look out for other Oozes that will buff the ones you already plan to make, or can be buffed by them in turn
Appearances aside, the real factor determining the price of the Through the Ages bonus sheet cards will be accessibility
Just playing a fetch land after this creature leaves you with a 4/4 trampler
Goblins in Magic are known for many things, primarily aggression (Frenzied Goblin), intriguing battle tactics (Goblin Diplomats, Goblin Balloon Brigade), and a wanton disregard for their own lives (Goblin Grenade)
Recursion is rather easy with Summon: Titan being able to put all lands into the battlefield from the graveyard, Evil Reawakened able to put any creatures back onto the battlefield, and Fight On