Talk:Codex Scanner/@comment-192.12.88.34-20131121235612/@comment-85.210.173.133-20140329184411

Affinity levels up weapons/warframes/sentinels. Mastery ranks up your account.

Every time a weapon levels up (through gaining affinity), it gives 100 mastery points to your account (200 for warframes and sentinels). Getting enough mastery points will cause you to run a mastery level test to qualify for the next rank.

Increasing your mastery rank allows you to buy/craft and use more weapons (E.G: Dera is unlocked at mastery rank 4).