How to get items to level up characters?

[io]

I need idols and anchors. But i don't know which campaign i should play and there no info in the loot screen about these items.

[Daniel3160]

If you do a map for the first time, the chests you receive will give you those items. Same with quest chests.

You can also do the Bloon Beacon maps for 1-4 of those items depending on difficulty.

Either way, you can't decide which items you get, they're all random so you've just got to keep at it.

[io]

Where can i find the Bloon Beakon maps? I don't see them in the Adventures tab.
NVM. I found useful guide https://www.reddit.com/r/battd/comments/9knr21/battd_unofficial_guide/