This price spike is caused by the fact that shadowless cards were only printed by one company over the course of about 2 hours, meaning that the amount of shadowless cards produced is very limited
With this being said, let's move past Thriller Bark and Dressrosa and move on to someone with a much more global presence
Deathtouch At the beginning of your upkeep, exile two cards from your graveyard
It deals a straight 200 damage, but you also get to look at your opponent's hand and discard a card from it
Do some mana fixing by copying Urborg, Tomb of Yawgmoth or commander protection by copying Karakas as long as either of them are in a graveyard
Prices may fluctuate the releases, but for now, the prices shown on M:TG Goldfish are good indicators of which cards will be true chase rares