Though it costs six mana to get out, there are plenty of ways to cheat artifacts into play, so thats not really a problem at all
Not only snow lands, which we desperately needed more of anyway, but also other snow cards, including instants
TCG Grand Creators Booster Pack" is Gaming
Card List Monsters x30 x3 Genta (Super) x3 Overking Of Dark World (Ultra) x3 Snoww (Secret) x3 Broww (Secret) x2 Grapha (Ultra) x1 Goldd (Secret) x1 Sillva (Secret) x1 Lucent (Super) x1 Ceruli (Super) x1 Beiige (Ultra) x1 Zalamander Cat (Ultra) x3 Danger
They gain first strike until end of turn
Its a nice, blinkable steal effect that should see play in decks that wouldn't otherwise be interested in playing mana rocks, or decks that have extra attack steps