Mara, Skygem Sage

Luck X (At the beginning of your upkeep, you
may shuffle your library and reveal the top card
of it. If that card's converted mana cost is X, put
it into your hand. X is equal to number of artifacts
you control.)
Whenever you draw a card, you may pay {2}. If
you do create a colorless Treasure artifact token
with "{t}, Sacrifice this artifact: Add one mana
of any color."