So I was recently exploring different planets when I cam across my first tentacle planet. The entire thing was a tentacle zone and the giant tentacles in the background got me thinking. It would be awesome if on tentacle planets all the monsters where tentacle monsters and they all had a huge tentacle boss. Like if you dig down to the core of the planet, instead of lava you find a giant cavern with a huge ball of flesh with tentacles going through the walls " the tentacles you see above ground" and it attacks you with different swiping attacks and maybe shoots poison too or something and maybe there are pods all over the place that hatch smaller tentacle monsters to help the boss, like the lower its hp the more hatch and the stronger they are. Just my thoughts after finding my first planet like this.