Ramp and defense
If you build up to the ultimate, you can even win the game outright
I've been guilty many times of skipping straight to a Planeswalker's ultimate ability and overlooking the ones higher up
Of these cards, Curious Homunculus is the clear winner in my book mana ramp that transforms into cost reduction, a more potent interpretation of mana production, is incredibly strong, even if you have to wait a full turn cycle to start taking advantage of either mode

$3.99 The Wandering Minstrel (0403 - Borderless) Final Fantasy Variants $0.49 Zidane, Tantalus Thief (0405 - Borderless) Final Fantasy Variants $0.49 Ambrosia Whiteheart (0325 - Borderless) Final Fantasy Variants $2.49 Raubahn, Bull of Ala Mhigo (0388 - Borderless) Final Fantasy Variants $1.49 Balthier and Fran (0393 - Borderless) Final Fantasy Variants $0.79 Fang, Fearless l'Cie (0381 - Borderless) Final Fantasy Variants $9.99 Vincent Valentine (0383 - Borderless) Final Fantasy Variants $0.49 Prompto Argentum (0387 - Borderless) Final Fantasy Variants $3.49 Hope Estheim (0396 - Borderless) Final Fantasy Variants $3.49 Firion, Wild Rose Warrior (0386 - Borderless) Final Fantasy Variants $1.49 Seifer Almasy (0389 - Borderless) Final Fantasy Variants $0.49 Torgal, A Fine Hound (0345 - Borderless) Final Fantasy Variants 0 results found
Dont have a flyer on board when your opponent does