The first 4 » 8 » 12 times you use a Heal or Regen item each fight, gain 50Max Health for the fight.
BazaarDB automated finding: The counter that tracks uses increments on ANY item use, not just Heal or Regen items. This means using non-Heal/Regen items will consume the limited uses without granting Max Health. Confirm with Deep Mechanics.
When you gain Regen, a Burn item gains +1 » +2 » +3Burn for the fight.
BazaarDB automated finding: The tooltip says 'When you gain Regen' but the ability actually triggers when one of your items performs/applies Regen, not when you gain Regen. Confirm with Deep Mechanics.