Any defect or damage - from scratches, surface-warping, off-centering, and so on - will decrease the value of a card
I think of it as the most flexible protection spell you could add to a deck
Brago, King Eternal A long-time favorite of flicker players in Commander, Brago, King Eternal can blink as much as you want every time it deals combat damage to a player
The problem is that an Animar deck can just explode its hand of dorks on the table by carefully stacking them, and then you have a 6/6 Animar and four or five creatures out there
But Animar can be answered by targeted removal of the Red (Chaos Warp, burn before the counters arrive), Blue (Pongify effects, Imprisoned in the Moon, stealing, bounce), and Green (Beast Within, Desert Twister, Song of the Dryads, etc)