Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.) Casting a card by using its retrace ability works just like casting any other spell, with two exceptions: You're casting it from your graveyard rather than your hand, and you must discard a land card in addition to any other costs
Breaking apart the name doesn't help a whole lot in figuring out what it means, either outside of the "strato" prefix
Mortal Flesh Is Weak is the worst offender: in the normal archenemy format, it looks at all three of your opponents' life totals and sets the two highest down to match the lowest
To help determine the rarity, examine your cards carefully
It is the sixth-most played Blue card and hitting at #5 is...Negate proper...which this better than since it's cheaper
If all you want is to find one card you can find it but the Vault offers something more by letting you preview what cards would come along with it, allowing players to plot out the next several turns of the game and see if the sequence being offered would get it done
