Midarn, Dragon Lord

When an artifact enters the battlefield, you may pay {2}{r}. If you do, sacrifice it, then search your library for an artifact with mana value up to 2 greater than that artifact, and put it onto the battlefield tapped.
{2}{r}: this creature gets+1/+0 for each equipment attached to it until the beginning of your next turn. You may pay an additional {2}{r}: copy target equipment and attach it to this creature.
Activate each of these abilities only once per turn.