This white creature is amazingly annoying (and you know that's enough for some players!), and with any sort of blink this bird rogue becomes a serious control tool: Plotting a card from the stack can deal with uncounterable spells, and any counterspell you plot becomes effectively useless (since they don't work at sorcery speed!)
This incarnation of the character, The Eternal Wanderer , is fantastic for Commander
You can already find some pretty crazy Mairsil, the Pretender decks out there
Hitting any permanent with mana value 4 or less removes a significant portion of threats
If you're one of those people that don't much care about Magic: The Gathering's various crossovers, at least you can cross another popular IP off of the list before they're gone for good
By including as many of these cards in my cube as possible I would find that the games that were being played were improving