Backpack:
Be awarded up to 3x new playable items. Still worth visiting if you already have 3.




Fireplace:
Upgrade the stats on a card. Later, a gambling mechanic is added to it.




Pick-A-Card:
Simple, pick one of three random cards. A mushroom will appear under any that are duplicates of those in your deck.



Pick-A-Card based on cost:
As above, only you choose what the deployment of the card will cost.
Example: 1x Blood is something like a skink, 3x Blood is a grizzly etc. I am pretty sure all bone cards are lumped into one catagory. Somebody can correct me on that if wrong.

Pick-A-Card based on family:
One of three, but specific card families such as wolves, insects, reptiles or birds.




Pick-A-Death Card: Pick one of three death cards. Can be rerolled, but cannot give you duplicate death cards.
Thanks to Mi1kyPudd1e for the image and info



Sacrificial Stone:
Sacrifice a card and place whatever sigil it used to have on a different card.




Bonelord:
Sacrifice a card of your choice for... something special.
This is a good way to thin out your deck. The Bonelord accepts all cards as equal, except for ones that have a tasty amount of blood.


Cave of Trials:
Get a choice of 3 criteria to gamble on earning another, upgraded card. The cost is usually something like: "The three cards drawn will have combined attack power over 4", or "total HP over 6.".

Mycologists:
They splice two of the exact same card type together, including pelts. Avoid if you don't already have duplicates as it normally equates to a wasted move and all moves count. Splice one more to an already spliced pair for an achievement.


Woodcutter:
Choose a new body or head for your buff totem. The head decides which family of creature gets the buff, the bottom decides which buff. Example: Sacrificing squirrels yield 3x blood.



Prospector:
This is a rare one. Choose a card, get rewarded with either a golden pelt, or a crappy creature. I've only gotten this one once so if somebody has more info, please HMU.



Trapper:
Trade those teeth you collected for pelts. The pelts will be added to your deck and can be placed defensively in a batttle, but any "killed" get scrapped.



Trader:
Exchanges any pelts for animals. The quality of the pelt decides the quality of the reward.

Basic Card Battle:
Basic conflict resolution. Hit faster and harder to win. Not much more than that.
Get overkill damage to knock more teeth out to trade later on.



Elite Card Battle:
This is the upgraded version of the basic card battle. Leshy pulls out his own totem which might or might not absolutely steamroll your deck. There are no upsides to choosing an elite battle, such as special loot or whatever, except if you want the added challenge.

I've mostly added the icons as they are megacool, but, due to spoilers, that is all I am giving you. Maybe sometime in the future I would redo them as gifs. I really love the art style here.

THE PROSPECTOR












THE ANGLER












THE TRAPPER

I truely hope this helps somebody just starting out. If that's the case, please leave an animal pun down in the comments. It would be furry much appreciated.