You earn Gem Mastery experience by dealing damage to and killing monsters. Your reward depends on:
Experience is awarded automatically the moment a monster dies – there’s nothing to turn in and no menu to check. You don’t even need your Gem Mastery Necklace equipped, or in your possession at all, to earn experience; only your account’s Mastery Level and Mastery Gems require the necklace.
Your Mastery Level and experience are account-wide. Every character you play on your account adds to the same total, and every character benefits equally once leveled up.
A small number of one-time seasonal quests are an intentional exception – see the Halloween section below.
Mastery Chain has 30 levels. Each level unlocks exactly one new gem slot on your necklace, for 30 slots at max level. Below are the cumulative experience totals required to reach each level:
| Level | XP Required | Level | XP Required |
|---|---|---|---|
| 1 | 100,000 | 16 | 31,600,000 |
| 2 | 450,000 | 17 | 35,700,000 |
| 3 | 1,050,000 | 18 | 40,050,000 |
| 4 | 1,900,000 | 19 | 44,650,000 |
| 5 | 3,000,000 | 20 | 49,500,000 |
| 6 | 4,350,000 | 21 | 54,600,000 |
| 7 | 5,950,000 | 22 | 59,950,000 |
| 8 | 7,800,000 | 23 | 65,550,000 |
| 9 | 9,900,000 | 24 | 71,400,000 |
| 10 | 12,250,000 | 25 | 77,500,000 |
| 11 | 14,850,000 | 26 | 83,850,000 |
| 12 | 17,700,000 | 27 | 90,450,000 |
| 13 | 20,800,000 | 28 | 97,300,000 |
| 14 | 24,150,000 | 29 | 104,400,000 |
| 15 | 27,750,000 | 30 | 111,750,000 |
Reaching Level 30 requires a total of 111,750,000 experience. You’ll see a system message every time you level up, telling you a new slot is unlocked.
Three Halloween quest lines each grant a one-time bonus of 100,000 Mastery experience – exactly enough to reach Level 1 on their own – the first time you complete them on your account:
Each of these can only be claimed once per account, on top of their normal candy and item rewards. Everything else about Halloween – trick-or-treating, candy shopping, decorating – still does not grant Mastery experience.