Tree Grick

Tree Grick enters the battlefield as a Forest.
(It has "{t}: Add {g}" and isn't a creature.)
Reach
Whenever an opponent attacks you with one or
more creatures, if Tree Grick is a Forest, you
may have Tree Grick become a creature until
end of turn.
Artwork/creature source:
https://www.youtube.com/watch?v=BraYqeJF9to