And if your opponent lets him live for a turn, you can turn him into Ifrit, Warden of Inferno , a 9/9 that immediately fights another creature, before pumping out a pile of red mana the next turn
You need Delirium and 2B in mana
So they ended up with flashback, but you can tap a creature to cast it for cheaper. WotC considers flashback as deciduous, or a mechanic that they plan to reuse fairly often (although not in every MTG set)
Because nobody knows where it'll turn up, there's a chance you could stumble upon one of the rarest MTG cards in the world by chance
While the hand size adjustments are useful, there are just plenty of other ways to manufacture this for any blue decks, and the same goes for taking care of flying creatures, as useful as Reach can be in a pinch
Starfall Invocation, on the other hand, gives you an EtB all over again