After 30 seconds Shrapnel Bomb detonates inflicting 90 Physical damage and an additional 15 Physical damage every 1 sec sec for 10 sec to all players.
Triggering a Shrapnel Bomb early instead causes a localized detonation, inflicting 200 Physical damage to the player that triggered the detonation and an additional 15 Physical damage every 1 sec sec for 8 sec.