mtg card width A Survey of Magic's Oversized Cards File:Varsizes.jpg - Arcmage Wiki

You could combine it with cards like Bristlebane Battler to make more saprolings (or even better, to leech from an opponent that has that card and kill it later by doubling its counters)

He acts as a board wipe and a win condition, and is up there with the best colorless cards MTG players should pick up if they plan on running a colorless-centric deck

Join one of five powerful families and build your criminal empire

Mostly, it is for collectibility reasons that certain Magic: The Gathering cards can become so expensive

Dark, quiet, and menacing, Elves of Deep Shadows art is one that most old-school players will instantly recognize, and for good reason