You can blink planeswalkers with cards like Displacer Kitten that can target permanents other than creatures
Now, in my opinion, if you are playing Green, you should build a bit differently, even if you are running 5 colors
Basil Tenacious Mouse becomes very hard to get rid of, as his ability gives him Resist +1 until the start of your next turn
He leans into the clearly defined ferocity of the vicious swarm, and the combination of digitally painted and 3D elements hammer home the unnatural evolution and heavy modification present in Lukkas phyrexian transformation
This one provides the effect, you choose from among the available modes in every upkeep where you hold the Initiative
For Planets and Starships without a power and toughness, they will just gain much stronger abilities but not become creatures