You can get black pearls from your Otter If you send it to kill fish

Use to tame the rainbow centipede in caves and on scorched earth

This does work on tames, I say this just to make sure that every one know.

+50% EXP benefits -

- Consume before killing something big like a giga it will give 1.5x the amount of experience given

- Consume before completing cave pursuits (mobile) it will give tremendous exp over 5,000 and above

(Can also be used on creatures)

Extra -

Can also be used to tame the Arthropleura anti flak centipede

You can get black pearls from squids and lobster things in the ocean.

Use it before completing swamp or yeti cave for extra xp

The deathworm horns can be used in place of rhino horns

Drink it and then kill Baby Charc's for n insane XP Party.

Use it before birthing/taming a reaper