Requesting new things in Pro shop. Rune chests would be great

I have basicly all the pro items I want and i’ve had them for a very long time.
I got a Level 10 nemesis as well and now im sitting on 600k+ Crystals.

Sure could donate Phoebe but for what purpose? In all bases you can just push the Phoebe into Your army and it dies in few Seconds anyway.

So could we please have some sort of Crystal sink? Like guardian chests, pal chests, rune chests. Rune chests being the most interesting in my opinion since you need billions of them to get anywhere powerful anyway