Jean-François – 5* Fire/ Red - February 2020 HOTM (Hero of the Month)

[FraVit93]

No, the effects replace themselves.
You can learn more about dot here:

Status Effects (Buffs and Ailments) and Stacks - Dead topic see link in post #190

This topic is outdated. Please check the new topic here A comprehensive list and guide to all status effects in the game. Table of Contents Description of Status Effects and what Overwrites what Primer on Status Effects Class Talents & Non-PVP status effects Last Update: 2021-01-19T05:52:00Z (UTC) Reuben Special Skill effect added: [Reduced_DoT43x43, 50%] Krampus Special Skill effect added: [DefUp_increasing52x52, 50%] Wiki Page on Status Effects (list of all heroe…

and here:

Understanding DoT (Damage over Time)

What is DoT? While many special skills have an instantaneous affect, others cause an effect that occurs over multiple turns. Currently, these effects can last anywhere from 2 to 6 turns. Special skills that decrease an opponents health are referred to as DoT, or Damage over Time. How is DoT inflicted? Different heroes inflict DoT in various ways. This includes “Burn damage” (see Jahangir, Kelile, and Marjana) and “Poison damage” (see Oberon, Proteus, and Sartana) which is found amongst many h…