CHESTS
Chests are one of the mainsources to get artifacts, materials, AR EXP and CHAR EXP scrolls. You will find them all over the world on your adventure.
Be sure to spend some time to explore the starting city Mondstadt! You will find plenty of chests on roofs, walls or windmills...
Also note that during co-op, all chests are locked for non-world owners and cannot be opened.
COOKING
Different dishes have different stats that you can make as you unlock and find recipes throughout the game.
These stats include: Stamina reduction cost, HP gain, DEF increase, and ATK increase.
Remember to select a character with specialization on every dish you cook. Some can trigger a custom version of the dish, which will have higher stats. So be sure to pull for different characters to potentially get cooking benefits.
You can take a closer look to the cooking mechanics
