fluid granite
I don't know whether these are still getting read by the developers, but the Shroom charm right now is a very weak charm. It is not necessarily better than equal attack damage, however Shroom charm only makes the card deal 1 extra damage.
I think just making shroom charm apply 2 
instead would make it good enough.
runic girder
Put Shroom Charm on anything with Frenzy and it instantly becomes multiple times better than Battle Charm in basically every way
Also it’s a boostable effect with e.g. Lupa
jaunty zephyr
It's also a great way to deal with clunkers or block , tho very niche
runic girder
I wouldn’t say it’s niche tbh, there’s a 50% chance you get the Krunker fight and a 1/3 chance to get The Ice Krabs, plus default Eye of the Storm has Spike Wall and Ice Forge