Update 1.9.0: New spider forms have been released!

Spider form is a form that features the use of "silk projectile" to modify terrain and contain enemies, and has a special "evolution" way.
Additionally, a tool item has been added to the OP that allows you to easily set the forms of others and yourself
The full changelog will be available later

(Yes, I know spiders in real life don't go through metamorphosis development... This is for gameplay reasons! )