Windborn Muse
Creature — Spirit
Flying
Creatures can't attack you unless their controller pays 
for each creature they control that's attacking you.
A single glimpse was enough to compel Captain Velkarne to lay down his sword and take up the poet's quill.
Ron Spears
Dominaria Remastered (DMR)
• #415Rulings
Creatures may still attack planeswalkers you control without their controller paying a cost.
(wotc • 2022-12-08)
Rulings
Creatures may still attack planeswalkers you control without their controller paying a cost.
(wotc • 2022-12-08)