Barrel Mastery

Barrel Mastery was introduced into Scrap Clicker 2 on the 14. march 2019 in the 7.0 update and is one of the most complex and fun lategame features, according to most players.

In update 10.1 it was expanded (Max. level from 5 to 20).

In update 10.5 it was expanded (Max. level from 20 to unlimited).

It comes from a complex suggestion by the player Phazer (Link to the idea).

Announcements and leaks
Barrel Mastery was announced on the Discord Server on the 4. march. On the 13. march, there was a beta version available for a very short time.

Also, before the public announcement, there were DM leaks showing Endte talking a little bit about the Barrel Mastery. In addition to this, he announced himself that 6.9 will be skipped, which started the hype.

Unlock
It can be unlocked at a x400 Stars tree upgrade for 50k Magnets.

At x600 Stars, a Mastery Overview is automatically unlocked. It can be opened by clicking a blue box with an i in the top left corner of the mastery upgrades.

How it works
It adds stars (White / yellow with a number in the star if yellow) to the barrel list. When a barrel is tapped, information can be seen. The barrel has to be merged x times to reach the next Mastery level, which gives Mastery tokens. There are infinite Mastery levels:


 * 15 Mastery Tokens can be won from 10k merges of a single barrel.
 * While 1* barrels gives 4 tokens / 1k merges, 5* gives 2 / 1k merges and 20* gives 0.067 / 1k merges.

Use
Mastery Tokens can be spent on several upgrades (blue up-arrow at the top left corner of the barrels list). They all cost the same, but some have certain unlock requirements. You can find a full list at Mastery Upgrades.

Upgrade Costs
These are the Mastery Token prices to upgrade any Barrel Mastery Upgrade:

Trivia

 * It was seemingly the most hyped feature together with the Scrapyard v5.
 * It's most effective to get all barrels on Mastery level 1, then 2, then 3 etc.
 * There's no sense in trying to max out the last 3 barrels and it's actually not even possible to level the last barrel.
 * It's the only thing in the barrel tab that gives a boost.
 * It would take 127 million merges to max out every barrel.