Dishonored rune planner: power costs and when you can afford them
The journal's Powers page prices one upgrade at a time. A second level always needs the first, so the real price of a power is the sum of both. The rune planner adds every prerequisite, totals the build and lines it up against the runes each mission holds.
How many runes does a full build cost?
Take 
Bend Time II, 
Windblast II
and 
Dark Vision II for Corvo.
Each second level brings its first level with it:
- Windblast I
- 3 runes
- Windblast II
- 4 runes
- Dark Vision I
- 1 rune
- Dark Vision II
- 2 runes
- Bend Time I
- 2 runes
- Bend Time II
- 8 runes
- Build total
- 20 runes
Open this build in the planner to see the same selection.
After which mission can you afford it?
Every mission's end screen lists the runes found in it. Added up in mission order, they reach the build's 20 runes after Lady Boyle's Last Party:
- High Overseer Campbell
- 7 found, 7 in all
- House of Pleasure
- 5 found, 12 in all
- The Royal Physician
- 5 found, 17 in all
- Lady Boyle's Last Party
- 3 found, 20 in all
That count assumes you pick up every rune those end screens list and spend none on anything else. The rune the Outsider grants in the dream and the rune handed over at the Hound Pits after Lady Boyle's party come on top of it, and Piero's Shop sells one more for coins. Use the mission pages to find where each rune lies.
Why do Corvo and Daud pay different prices?
The same power is priced per campaign. 
Blink II costs
3 runes for Corvo in Dishonored and
4 for Daud. Bend Time runs the
other way: Corvo pays 10 runes for both levels,
Daud 8 in The Knife of Dunwall.
Open Daud's Bend Time to compare.
Daud starts The Knife of Dunwall with Blink, 
Void Gaze
and 
Arcane Bond at level I, so the planner never
charges for them. 
Pull appears only in
The Brigmore Witches: 2 runes for the
first level and 4 for the second. A compatible save
from The Knife of Dunwall can carry Daud's upgrades into The Brigmore Witches;
the planner keeps a separate plan for each campaign and does not read that save,
so add the upgrades you carried over yourself.