Please tell me: What IS this?

Goo Gaa (Goo Goo Ga Ga, Gaga Goo Ga Bla
Bla Bla.)
English translation: Confuzzle: (When this creature
attacks, blocks, activates an ability, enters, or
leaves the battlefield, tap target creature.)
-Wizards editorial team
Sorry about the error.
Thank you for your understanding!