Thats because Birds of Paradise is a one-mana 0/1 flying creature that can tap to add any colour of mana
Furthermore, Grist can grind out an endless stream of blockers or threats while being difficult to remove using cards that are normally good against creature decks (Prismatic Ending and Unholy Heat aside)
The top Auras are about utility, recursion, and forcing your opponents into bad situations
If you are capable of healing your cards, through items, actions, or character abilities, and Beast, Tragic Hero has damage on them at the start of your turn, you can let them attack and then heal them, allowing you to still benefit from the increased strength but keeping them healthy enough to stick around
Weve got a full list of them , but for now, weve narrowed down our top 12
Then, there are many cards that give you a benefit when you sacrifice a clue, like Tireless Tracker, so you should consider playing these alongside Lonis