>>14417554Try to find the Alchemy Table in the dungeon, pic related, if you still didn't made a potion table (empty bottle on a table), replace it immediately with this crafting station, you get a chance of 33% of saving ingredients, so you have a 1/3 chance to make one potions more for each potion made with this station.
Slime King spawns randomly, but you can do a summoning item. Do a crown with 5 gold/platinum bars and a ruby, get 20 gel, bring those two ingredients to a demon altar, those purple stone altars with old bones sticking out.
Queen Bee can be found in the underground jungle, there is a larvae in bee hives, destroy this to summon her.
There is also the Deerclops boss from Don't Starve, this one spawns during in-game midnight in a snow biome while there is a blizzards, you should have a blizzard if it rains in your spawn area.