GB's Underground Factory

{t}: Create a treasure token. You get {e}{e}.
{x}, X {e}'s, {t}: Search your library and graveyard
for an artifact with converted mana cost X or less
and put it onto the battlefield.
Shuffle your library.
Sacrifice two artifacts: Add {c}{c}. You get {e}.
It encourages inspiration, creation, and innovation!
-Golf Ball