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Green creatures often have trample , making them hard to block effectively

Instead, you have to exile a card from your hand to Chrome Moxs Imprint ability, and Chrome Mox can then tap for any color of the Imprinted card

In the process, it would often spell doom for any opposing player, especially if its owner had a card with a relatively high converted mana cost in their hand

While it lacks the board wipe clause of Living Death or Living End, Bidding gives you a different path to break the symmetry of its mass reanimation

Rarer Magic cards tend to be more complex, and this often means they're more powerful

But that is a factor too, of course