Liana, Mistress of Steel

+1: Put X 1/1 colorless Myr artifact creature tokens onto your side of the battlefield. X is 2 plus the number of artifacts you control.
-X: Put an artifact from your library with converted mana cost X or less onto the battlefield. (X can be 0.)
-6: You get an emblem with "Whenever a player casts an artifact spell, put a token that's a copy of that artifact onto your side of the battlefield,