Alastor

When Alastor enters the battlefield, gain {e}{e}. When another artifact enters the battlefield, gain {e}.
Equipped creature gets +1/+1 and has
"{e}{e}: This creature gains double strike until end of turn." and has "{e}: This creature gains +1/+1 until end of turn. This can only be used once per turn."
Equip {r}{u}
Equip {e}