All of the Merlin cards give an ability when returned to hand, like the Merlin Crab which gives another character +3 strength when challenging, when they are played, and when they leave play (which can be in the same turn for a super boost), and Madam Min returns cards to hand when played
So if youre a Miku super fan, its best to buy the cards as soon as pre-orders open up.
Just for the added Mana acceleration) If protection pieces are your next target, consider adding in Flawless Maneouver, Coppercoat Vanguard, Lena, Selfless Champion or Boromir
Combined with Skyship Stalker or Scourge of Valkas, this ability has deadly potential
Next question, why does it fly if nether merfolk or elves fly
Heliod, Sun-Crowned (Theros Beyond Death) This has made waves in a few formats now, owing to his ability to combo with Walking Ballista and win the game