a common target is Command Tower in my Commander games)
Then exile it.) "Flashback [cost]" means "You may cast this card from your graveyard by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." To determine the total cost of a spell, start with the mana cost or alternative cost (such as a flashback cost) you're paying, add any cost increases, then apply any cost reductions
If the Aura can't legally be attached to anything, you won't be able to put it onto the battlefield, and it will be put into your hand by the next part of the effect
Theres just so much ramp, Izzet, fatties, and control
Its a solid card, and likely playable in Commander, but it shines most brightly when viewed through the lens of flavour and its wider implications for the overall Magic narrative