Adding 20 cards to your deck seems like a massive drawback that would hamper the consistency of your deck yet Yorion got the ban hammer in several formats, and some Modern decks still tinker with 80 cards, even without the extra creature in their sideboard
It's worth noting with a card like Gravecrawler in play you can just sacrifice that, get a 2/2 decayed token on your end step, and just keep doing that turn after turn
Considering the card isnt just good, but also a whole lot of fun, this isnt too much of a surprise
It can clip a Sol Ring and still let you curve out the same turn
Helping to illustrate the risk-reward collector mindset, four raw sales on eBay from March to May were tracked, each in varying conditions: March 14: $3,100 March 23: $3,200 April 9: $3,850 May 22: $2,700 It is worth noting that there are two versions of this card: base/standard and Artist Proof
You'll soon find out, for better or worse