I was able to unlock the 100 damage achievement using *The Soulbound Skulls*. It couldn't be achieved through normal methods, but stacking the Soulbound effect made it possible. (If I recall correctly, I think I had two allies in a soulbound state while facing a single opponent.)

Gnome Stuffs: I got the win with gnome in the same run as I first got him. It also happened to be my win at storm 10 after struggling on it for so long... I didn't really use the gnome at all. I just took him via the extra companion bell and used him as a meat shield

Snowball Fight: I used Snobble (apply snow equal to damage dealt), managed to get him to 7 attack via some lucky charms, and had demonize. It is worth noting I got it while killing the target via applying snow prior to the big attack

Feed the Beast: I got it without knowing it existed, just gave the Muncher a Gunk Fruit from the storm bell

Best Friends: I love Sneezle. Had a self healing leader and I got a bunch of tanky cards/charms for Sneezle, and a bunch of scrappers

Quick fact I thought I should say: For some this might have been obvious, but for those who don't know, the Gnomebringer achievement can be unlocked by getting any ending, not just the true ending. When I was first trying to unlock it, I thought that since the name was similar to Sunbringer I had to specifically do the true ending, but when I kept failing I eventually decided to gamble on if it could be done with the "false" ending, and it turns out it can be done.

Hey, just wondering if you're planning on updating this guide to help with the new achievements once you have the time to get them?

Ok, so an easier to getting 100 damage on enemies is to get Chompom, Kernel and Shelly (recommend kernel for easy shells), and Dimona or Demonheart item (for demonize effect aka double damage) if possible, for items I recommend the nutshell cake on Chompom, Shell Shield and Shellbo (Shellbo does damage but not enough to kill your Cards and the damage it does is considered a bonus if you have Kernel in front of Chompom cus taking damage will give additional shell to Chompom

Once Chompom reaches 50 shell or the damage is enough either through charms and spice, make sure the enemy have demonize to get that sweet double damage

They might have changed that in a patch, yeah. I haven't tested it myself but I'll remove it to be sure.

i don't think you can use the soulbound skulls for the big hitter achievement anymore. I tried it many times and it didnt work

Don't know if this still applies but I used the soulbound skull and it didn't activate the achievement

Another not nearly as good way for bigger hitter is using Yuki on a stall fight and constantly snowing. Ngl tho it took me like 10 mins or something to get up to a 100 but it worked!

I'm here to inform everyone that for the Tough Nut achievement, enemies do not count. Yes I did use the given strategy of stalling out the Bolgo encounter and got to 50 Shells and it did not give it to me. There could be something you could do with the Shade Wisp that summons a copy of an enemy with only one health and just giving it health until it gives one of your allies 50 Shell. It would take a while but it's worth it.