We could throw them all in the graveyard and resurrect them with Rise of the Dark Realms
This is a solid effect in some decks, but so far its been a niche piece in the grander scheme of Magic
Billy passes out free counters just for hitting land drops, and the activated ability can be lights out if you've distributed counters well enough
It has only been printed once, making supply extremely limited, so it's natural that its price increases steeply based on rising demand
Showcase foil: $15 Borderless foil: $18 Prerelease foil: $16 Regular: $6.50 Urabrask, Heretic Praetor Another Phyrexian Praetor slipped into a Standard-legal MTG set, with the foil Phyrexian version of Urabrask, Heretic Praetor priced at around $45
These are key to showing the scarcity of cards and are one of the reasons you're seeing such expensive prices