Eucalia, Spirit of Refuge

When Eucalia, Spirit of Refuge enters the
battlefield, choose a color. Creatures you control
with converted mana cost 2 or less have hexproof
from the chosen color.
{2}{w}{u}, {t}: Creatures you control with
converted mana cost 2 or less lose hexproof from
the chosen color and gain hexproof from another
color of your choice.
"Hush, now."