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 limits how many times you can gain Max Health triggers when Friend items are used, not when Heal or Regen items are used as the tooltip states. 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.