Your magic attacks and minions grow stronger the less health you have Magic attacks and minions inflict On Fire! Mana regeneration massively increased when below 2/3 of your maximum life When below 1/3 of your maximum life, your magic attacks and minions inflict Daybroken instead of On Fire!
The Heart of Passion is a post-Sisters of Discord tier Expert Mode-exclusive accessory that is obtained from the Treasure Bag dropped by Sisters of Discord. When equipped, your magic attacks and minions become stronger as you lose health. Also, your magic attacks and minions inflict On Fire! debuff when you are above 1/3 of your maximum life and Daybroken debuff if you are below that health threshold. And your mana regeneration is massively boosted when you are below 2/3 of your maximum life.