When Tezzeret's Gatebreaker enters the battlefield, look at the top five cards of your library. You may reveal a blue or artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. {5}{U}, {T}, Sacrifice Tezzeret's Gatebreaker: Creatures you control can't be blocked this turn.
[+1]: Draw a card. [0]: Until your next turn, target artifact you control becomes a 5/5 creature in addition to its other types. [–7]: Put any number of cards from your hand onto the battlefield face down. They're 5/5 artifact creatures.
[+2]: Put two +1/+1 counters on up to one target creature. [–3]: Target creature you control deals damage equal to its power to target creature you don't control. [–9]: Creatures you control get +4/+4 and gain trample until end of turn.