As long as you control an artifact, Scrapyard Mongrel gets +2/+0 and has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)
As long as you control an artifact, Scrapyard Mongrel gets +2/+0 and has trample. (If it would assign enough damage to its blockers to destroy them, you may have it assign the rest of its damage to defending player or planeswalker.)
Trespassers are welcome to try.
