Mastery Tokens

Mastery Tokens give 0.1% of the maximum mastery pool exp to mastery pool of the corresponding skill when they are claimed. Mastery Tokens are earned randomly while skilling in a non-combat skill. The drop chance for mastery tokens is 1 in [math]\displaystyle{ \frac{18\,500}{\text{Milestones unlocked for skill}} }[/math]. Each thing you unlock by leveling the skill counts as a milestone e.g. smithing steel platelegs is unlocked at level 40 and counts as one milestone, additionally reaching level 99 in a skill counts as one milestone. Wearing Clue Chasers Insignia increases the drop chance by changing it to 1 in [math]\displaystyle{ \frac{18\,500 \times 0.9}{\text{Milestones unlocked for skill}} }[/math].

Mastery Token Chance at Level 99

Skill	Approximate Mastery Token Chance
	Base Game (Level 99)		Throne of the Herald (Level 120)
	Without	With	Without	With
Smithing	1/119	1/109	1/87	1/79
Runecrafting	1/210	1/191	1/133	1/121
Crafting	1/256	1/234	1/162	1/148
Fletching	1/260	1/237	1/186	1/170
Agility	1/342	1/311	1/234	1/213
Herblore	1/513	1/467	1/355	1/323
Cooking	1/544	1/495	1/342	1/311
Farming	1/685	1/623	1/474	1/431
Fishing	1/711	1/647	1/462	1/420
Thieving	1/804	1/731	1/544	1/495
Summoning	1/880	1/801	1/637	1/580
Mining	1/1,423	1/1,294	1/804	1/731
Astrology	1/1,541	1/1,402	1/1,156	1/1,051
Firemaking	1/1,681	1/1,529	1/925	1/841
Woodcutting	1/1,681	1/1,529	1/925	1/841
Archaeology	1/0	1/0	1/0	1/0