Spoiler Warning!
If you're talking about the Pillars:
Beer, Horehound, Feather, Pocket Bell, and Iron Ingot (in that order from left to right)
Beer - you can buy from the tavern
Horehound - found in the goat tribe, explore there
Feather - found in waterfall, explore there
Pocket Bell - defeating Goat Huntsman in Ancient Tree, explore there until you get an encounter or during the time they're training in the Goat Tribe and asking the one goat training there to fight you.
Iron Ingot - Found by defeating Werewolves in the Dark Forest, explore there