I could quite easily build the Bone Wall up to 20+ while you're waiting to float the rest of your weapons
And how would you do that? A creature has to die for the Bone Wall to get bigger. I don't have any creatures you could eat, so you have to eat your own creatures. If you put up a Bone Yard, I will destroy it so FFQ's and Fireflies are your best chance.
You are somehow assuming that you could have 2 Otyughs and 2 FFQ's (most rainbows have only 1) early in the game constantly spamming Fireflies and eating them and making Bone Wall Bigger, while I'm doing nothing but waiting for cards. It doesn't work that way.
Like I said, I have 6 explosion that I can use to get rid of those Sundials, Bone Yard and Bonds (if you have many characters on the table).
Sure this 20+ Bone Wall could happen and if it does, I'm pretty much done. But your suggesting like it's going to happen every time and there is nothing I can do about it which is not true.
I see decking out as a much bigger problem than Bone Wall.