True Northern Defense
UNIQUE- All Champions except Guardian: +[1,000] Block Proficiency.

Every sig anchor × rank at A0. Sig levels in between interpolate smoothly (PCHIP) and round to the nearest 10 BHR — matching the in-game display.
| Sig | R3 | R4 | R5 |
|---|---|---|---|
| 0 | 19,970 | 24,380 | 28,910 |
| 20 | 22,020 | 26,890 | 31,890 |
| 40 | 22,860 | 27,910 | 33,100 |
| 60 | 23,560 | 28,760 | 34,110 |
| 80 | 24,180 | 29,520 | 35,010 |
| 100 | 24,750 | 30,220 | 35,840 |
| 120 | 25,280 | 30,870 | 36,610 |
| 140 | 25,790 | 31,490 | 37,340 |
| 160 | 26,270 | 32,070 | 38,040 |
| 180 | 26,730 | 32,640 | 38,700 |
| 200 | 27,170 | 33,180 | 39,340 |
BHR at each signature level by rank (non-ascendable — A0 only). The curve is concave — sig 0 → 100 captures roughly two-thirds of the gain from sig 0 → 200.