Worked out by the game's own trait code: the boon's first copy at each rarity, then each Pom of Power level, which adds the same amount whatever the rarity and less each time. A range means the game rolls the value between the two when the boon is offered.
Slow Duration
Common
Rare
Epic
Heroic
Level 1
4
4
4
4
Level 2
8
8
8
8
Level 3
12
12
12
12
Level 5
20
20
20
20
Level 10
40
40
40
40
Each Pom adds 4, 4, 4, 4, 4, 4, 4, 4, 4 (levels 2 to 10).
Common
Rare
Epic
Heroic
Slow Duration at each level and rarity.Show the numbers
Level
Common
Rare
Epic
Heroic
1
4
4
4
4
2
8
8
8
8
3
12
12
12
12
4
16
16
16
16
5
20
20
20
20
6
24
24
24
24
7
28
28
28
28
8
32
32
32
32
9
36
36
36
36
10
40
40
40
40
Initial Slow
Common
Rare
Epic
Heroic
Level 1
15%
19%–23%
30%–33%
37%
Level 2
20.1%
23.9%–27.6%
34.2%–37%
40.8%
Level 3
23.3%
26.9%–30.5%
36.8%–39.5%
43.2%
Level 5
27.8%
31.2%–34.6%
40.6%–43.1%
46.5%
Level 10
38%
40.9%–43.9%
49%–51.2%
54.1%
Each Pom adds 6%, 4%, 3%, 3%, 3%, 3%, 3%, 3%, 3% (levels 2 to 10).
Common
Rare
Epic
Heroic
Initial Slow at each level and rarity (the middle of a rolled range).Show the numbers
