From there, once you get Walking Ballista in your graveyard, you can sacrifice the Human Soldier to stop your opponent from casting any noncreature spells during your turn
Some are even instant-speed, letting your creatures dodge removal spells or other forms of interaction
And while protection from white is circumstantial, most Commander games will have at least one player with white mana in their deck, so that protection is rarely totally dead
Yuna has two abilities, both related to her summoning ability
If we think about creature auras using quadrant theory, enchanting your own creatures is something thats great when youre in a winning board state, reasonable when youre at parity, risky during the developing turns of the game and actively bad when youre behind