Inferno Soul

Menace.
When Inferno Soul deals damage to a player it
gains an emblem with "At the beggining of your upkeep, you gain one inferno counter, then this
emblem deals 1 damage to you for each inferno counter you have".
When Inferno Soul deals damage to a creature it
gains "At the beginning of your upkeep, this
creature gains one inferno counter, then this creatures deals 1 damage to you for each inferno counter on it".