Percentage costs took their share of the max pool, so Bloodrage cost 20% of max health. The reference's basis table (`0x612c50`, reached from `GetPowerCost` `0x6e31b0`) reads the caster's fields:
| power type | basis |
|---|---|
| health | base health (`UNIT_FIELD_BASE_HEALTH`, 163) |
| mana | base mana (162) |
| rage | 1000 |
| focus, energy | 100 |
| anything else | 0 |
`cost_basis` now holds that table, and `power_cost_at` reads through it for the tooltip, the press-path gate and the action bar. The spell tooltip's rebuild inputs watch base health in place of max health, for the player and the pet. Tests pin each type's basis, and Bloodrage on real data: "337 Health" at level 60, whatever the gear.
Fixes#604
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Co-Authored-By: Sam <samuv.eth@gmail.com>
