When a Masters set has a high expected value, it's a lot easier to justify spending $45 on a booster draft or $200 on a booster box because even though the up-front cost is high, you know that you'll get some of that money back in the form of cards you can use to build decks or, if you don't get the specific cards you need, trade or sell to get the cards you do need for your decks
This pair aren't normally going to be in the same deck, but they are both in the same genre of dork - making a Merfolk beater with big card flow attached for 6 or 7 mana
Esika, God of the Tree The quiet and humble Esika understands the World Tree and the Cosmos better than anyone, even Alrund
Emergency graveyard removal at this cost and speed is great
We don't actually see the imposing visage, but all those guys are sure horrified at it
For a 2-drop, its ability is incredibly powerful and only brings more value as the game progresses