Dragonlord Dromoka may not have generated as much initial buzz as some of her brethren, but she's a card that can stop entire classes of decks in their tracks
Nowadays, players have loads of options for adding to their collection or building their decks
Like the similar Omen of the Sea, Medomais Prophecy leaves a permanent to sacrifice or bounce afterwards (you dont need the last chapter here)
As an example, pay one black for each time you want to kick Bloodhusk Ritualist, and your opponent will discard that many cards
In terms of performance, its Grass Knot is a rather unique move that relies on the opponent's retreat cost to determine damage, making it memorable for that alone
(Namely that Immersive Meowth card.) This means you really need luck on your side to complete this Secret Mission