Go with the wurm if you're looking for a finisher that can potentially kill off opponents with its ETB trigger, or the demon if you're looking for more utility and flexibility
Luffy Manga comic panel variants, for example, are particularly difficult to come by which certainly affects their value
Creature Whale Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Whenever Colossal Whale attacks, you may exile target creature defending player controls until Colossal Whale leaves the battlefield
Fill your deck with high damage dealers, and discard them as soon as you can, and you'll be rewarded with a wide array of effective abilities that can knock out your enemy in no time
In a four-player pod, that means you could be making up to six treasures each turn off the ability, which Olivia can then convert into a massive buff for your whole board