Darksteel Colossus on Turn 1

As an additional cost to cast this spell, sacrifice an artifact. Search your library for an artifact card, put that card onto the battlefield, then shuffle.

If this card is in your opening hand and you're not the starting player, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand. : Add . If Gemstone Caverns has a luck counter on it, instead add one mana of any color.

, Sacrifice this artifact: Add three mana of any one color.

: Add .

Creatures you control have haste. (They can attack and as soon as they come under your control.)

, Sacrifice this artifact: Add one mana of any color.

(: Add .)

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Indestructible (Damage and effects that say "destroy" don't destroy this creature.) If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead.