Metalcraft — When Blade-Tribe Berserkers enters, if you control three or more artifacts, Blade-Tribe Berserkers gets +3/+3 and gains haste until end of turn.
2011-01-01
Once the metalcraft ability resolves, Blade-Tribe Berserkers retains its bonuses for the rest of the turn, even if you cease to control three or more artifacts for some reason.