The Unbidden

Shroud, Protection from Blue
When The Unbidden transforms, create four
3/3 Unbidden avatar tokens. As long as there are Unbidden avatar tokens on the battlefield, The Unbidden is not a creature.
{1}{u}{b}: Create a 1/1 Unbidden avatar token
{2}{u/b}, Tap a nontoken creature you control: Create a 2/2 Unbidden avatar token
{3}{u/b}{u/b}, Tap a nontoken creature you control: Create a 4/4 Unbidden avatar token with protection from blue