Every battle is an invaluable experience, and lessons can be learned for future battles. A veteran Viking shows no fear and strikes with unerring accuracy. Upgrading this Knowledge increases the offense stats of your tier VIII warriors.
| Level | Gold | Soul Shard | Time | Requirements | Tier VIII Warrior Offense | Influence | Hero’s Experience |
| 1 | 170K | 32.5K | 12w 00h 00m 00s | Warrior Healing Speed 1, Oracle 36 | 1% | 19K | 44.5K |
| 2 | 250K | 48.5K | 124w 5d 00h 00m 00s> 2 Year(s) | Warrior Healing Speed 2, Oracle 36 | 4% | 42K | 56.5K |
| 3 | 335K | 72K | 185w 1d 00h 00m 00s> 3 Year(s) | Warrior Healing Speed 3, Oracle 37 | 8% | 95K | 72K |
| 4 | 420K | 110K | 274w 6d 00h 00m 00s> 5 Year(s) | Warrior Healing Speed 4, Oracle 37 | 13% | 215K | 91.5K |
| 5 | 505K | 160K | 408w 1d 00h 00m 00s> 7 Year(s) | Warrior Healing Speed 5, Oracle 38 | 18% | 485K | 120K |
| 6 | 590K | 235K | 86w 4d 00h 00m 00s> 1 Year(s) | Warrior Healing Speed 6, Oracle 38 | 25% | 1.1M | 145K |
| 7 | 690K | 350K | 899w 6d 00h 00m 00s> 17 Year(s) | Warrior Healing Speed 7, Oracle 39 | 34% | 2.5M | 185K |
| 8 | 830K | 520K | 1 336w 2d 00h 00m 00s> 25 Year(s) | Warrior Healing Speed 8, Oracle 39 | 45% | 5.6M | 225K |
| 9 | 1.1M | 770K | 1 984w 2d 00h 00m 00s> 38 Year(s) | Warrior Healing Speed 9, Oracle 40 | 58% | 13M | 280K |
| 10 | 1.7M | 1.15M | 2 946w 4d 00h 00m 00s> 56 Year(s) | Warrior Healing Speed 10, Oracle 40 | 75% | 28.5M | 345K |
| 6.59M | 3.45M | 8 258w 3d 00h 00m 00s> 158 Year(s) | 75% | 51.56M | 1.56M |
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