Debuff
Bomb
When Bomb debuff expires, the affected Champion suffers direct damage that ignores their DEF value. The damage inflicted by the bomb scales per the Stat indicated in the skill description.
What the game's own status effects screen says
In the game data this effect appears as TimeBomb.
Champions that apply it
20 champions have a skill that applies Bomb, according to the effect lines in the game data. This lists who applies it, not how reliably: chance, duration and resistance are on each champion's page.
Astralith
Ezio Auditore
Fyr-gun Isbeil
Gaius the Gleeful
Galkut
Gnishak Verminlord
Grunch Killjoy
Haggibah the Nestmaid
Komidus Darksmile
Kroz Wallbreaker
Lemure
Lord Shazar
Magmablood
Malbranche
Ordinator
Souldrinker
Tallia
Treefeller
Valkanen
War Mother
The description is the game's own text. It has not been tested in battle here, and the game's wording can be loose (for example about numbers that differ between versions of an effect). See Data quality for what has and has not been checked. Found a mistake? Use "Report a problem" at the bottom of the page.