Decklist The decklist consists of 30 creatures, 12 sorceries, four instants, 15 artifacts, five enchantments, and 33 lands (one land the backside of a spell)
As such, Im of the opinion that hes probably best used in a deck focused around dealing direct damage and cards such as Curiosity
Early in the game, you'll activate it to make your creature bigger
In other games you could jump out to 30, 40 or even more life
A popular combo with Darksteel Forge is Mycosynth Lattice, which turns all permanents in play into artifacts, and with the Forge out, all your permanents are now indestructible
That's not even accounting for Singleton formats like Commander