Sure, you might pay a premium for the fancier frames, but some players feel its worth it to hold that piece of artwork in their hands
Instead of building around a specific card type or strategy your deck is built around a specific number
Overlord of the Balemurk Duskmourn MR Overlord Overlord of the Balemurk is great because it mills four cards as early as turn two, which is stellar for graveyard shenanigan decks
Usually on the menace creature but if not there then more often on another attacking creature than no benefit at all
The big downside to Palafin Ex, though, is it can only be evolved using Palafin's Zero to Hero ability, which makes it a little cumbersome to use
So, for example, I can tap [c]Katilda, Dawnhart Prime[/c] to put a +1/+1 counter on each creature I control