This improves organization
The ability to counter everything but planeswalkers and creatures for a single blue mana is well worth summoning a little Bird token for your opponent, and Swan Song is especially good in Commander where enchantments and wraths (board wipes) are a dime a dozen
You want to be informed when the price of MTG: Avatar the Last Airbender - Play Booster Box (30) reaches a certain value
We just saw Ob Nixilis, Captive Kingpin get printed in Mach of the Machine: The Aftermath and it turns out that in the end, the card did not work with Rakdos Charm the way we wanted it to
However, the splicing cost for Desperate Ritual is same as the casting cost, so this will only be a benefit in only the most corner of cases
These two abilities actually work really well together, as the mana ability will give you the necessary resources to play the three cards you just exiled off the top of your library