It's not a may effect... You must target something. If it's the only creature, it essentially can't attack. You're also putting your other creatures at risk as well. Probably easy to play around, but still something to consider.
Cool that you can Spell Queller something, attack, target your queller then bounce it to exile the spell forever. Probably not a common use for it, but things are things.
Run this thing with Staticaster and just eat things. The list of things this kills is actually kind of amazing. You can eat Wurmcoils for basically free, Ullamog must use one of it's exiles on this or it dies, and so on.
I read the title as "Flying Snail Marauder" and was super intrigued. I do like this card a lot though. It pulls it's weight for pirates on the ground fighting those huge dinosaurs and can dodge another flier. This will see play!
Target creature defending player controls
Dunes of Zairo
SHANDALAR
Innistrad - The Darkest Night
~THE RAVNICAN CONSORTIUM~
A Community Set
Commander: Allies & Adversaries
Looking good.
Cool card for sure