While this happened occasionally, more often than not the Consult acted as the ultimate Demonic Tutor, a one-mana instant which could fetch any card you needed out of your deck immediately
To have two commanders, both must have the partner ability as the game begins
However, lets say you have a card that has some damage and youre guessing it gets a 7 because of a small indent but you see that the holo is perfect, no scratches, corners/centering are great, etc
If cards didnt have a set weight, even for foil versions, then it would be far too easy to fake rare cards for a profit.
Urborg can make your swampwalk creatures unblockable, and it can make your colorless utility lands tap for mana