"If it is meant to be nothing but a machine," Karn finally asked Jhoira, "why did Urza build it to be like me?"

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Beast of Burden

Beast of Burden's power and toughness are each equal to the number of creatures on the battlefield.

Though it was built as an instrument of labor, it wasn't long before it became an instrument of war.

Beast of Burden's power and toughness are each equal to the number of creatures in play.

The heavier the load, the harder it works.

Beast of Burden has power and toughness each equal to the total number of creatures in play.