mtg all invasion cards Void | You may cast one of those two cards without paying its mana cost Invasion of Alara

Balthier and Fran A powerful attacker, and lord for vehicles, Balthier and Fran let your vehicles keep going and pounding your opponents

You don't get to play a super-overpowered mana source without a sacrifice, and the sacrifice in this case is actually tearing up Blacker Lotus

Then that six-drop Naya colored 4/5 legendary is next with haste to swing now, first strike to punch first and then vigilance to keep stuff back

As you might expect, phasing quickly became infamous for causing confusion and arguments over rulings, forcing Wizards to publish repeated clarifications at a time when that meant waiting a month to print them in the next Duelist magazine