Earning runes, with the odds printed

How to earn Brand runes in The Ember Depths 0.21: the Awakening, a pick of three every 5 Legend levels, chart boss, Warden and chest drops with printed odds.

Nobody falls through. The floor is guaranteed: the Awakening and a pick every few Legend levels. Everything you do in the endgame adds drops on top, and the odds are printed here, in the Lodge, on the chest sheet and in the Brand's codex.

The floor

The Awakening (Legend 1): 3 runes of the colour you choose.
A pick every 5 Legend levels (41 in all): choose 1 of 3 runes you don't own. Card 1 is from your leading colour, card 2 from your second, card 3 from anywhere. "Later" banks a pick; it never expires.
Own every colour rune? A pick becomes +500 XP for a Crest you choose.
A Survey Shard buys any colour rune you don't own at the Merchant (1 Shard). Prisms can't be bought.

Drops

Source	Rune	Prism	Leans toward
A chart boss falls	1 in 5	Tier 8+: 3% + 0.5% per tier above	Hunt (a chart with 2 or more Perils)
A Breach Warden falls	1 in 2; your first Warden always	3%	Bulwark; Pyre in a breach
An Ember Chest (Charts & Inks pool)	1 in 6 per roll	—	Pyre in a breach
Any of these with a player or sellsword along	—	—	Covenant

How a drop picks. A colour first: each counts 1, and ×3 for every lean that applies. Then a rune of that colour you don't own. A Breach Warden in a party leans Pyre, Bulwark and Covenant.
No wasted drops. A duplicate only happens when you own everything the roll could give, and it becomes Crest XP: 200 (400 for a Prism).
Co-op. Everyone rolls their own chart-boss and Warden runes. Ember Chests pay the leader, as they always did. Nothing drops in the arena or the Training Grounds.