Defender (This creature can't attack.) When Wall of Junk blocks, return it to its owner's hand at end of combat. (Return it only if it's on the battlefield.)
Urza saw the wall and realized that even if he tore every Phyrexian to pieces, they would still resist him.
![Wall of Junk [Urza's Saga]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/0919fc7f-e057-5f95-a218-7e8b9f07e1e9_721968b0-caa8-4edb-8988-4db2c3bd292b.jpg?v=1698569224&width=1445)