Mox Diamond
Artifact
If this artifact would enter, you may discard a land card instead. If you do, put this artifact onto the battlefield. If you don't, put it into its owner's graveyard.
: Add one mana of any color.
Dan Frazier
Stronghold (STH)
• #138Rulings
If you don't discard a land card, Mox Diamond never enters. It won't trigger abilities that look for something entering, and you won't get the opportunity to tap it for mana.
(wotc • 2008-05-01)
Rulings
If you don't discard a land card, Mox Diamond never enters. It won't trigger abilities that look for something entering, and you won't get the opportunity to tap it for mana.
(wotc • 2008-05-01)