It's hard to make a top ten list when you have 35 or 50 cards across the game with that factor
In the right deck theres no reason you wont hit at least one spell with a converted mana cost of 3 or less (maybe even another Bobblehead)
Heck, you could even use it to make casting some hydras easier, since you dont have to pump as much into the X cost of hydra creature spells
Similar to Lantern, Pluto's ability, Good Dog, acts as ramp for this deck, allowing you to cheat out cards a turn early, or play extra cards during your turn that you otherwise wouldn't have had enough ink to play
The Youtuber also brought up the faulty leaderboard within the games ranking system that didnt work for a lot of users, yet it was used to select qualifying players for the cup
Moreover, obtaining duplicates of these is just as likely as getting any other card of the same rarity