Riruku-pattern antimatter charge
From Halopedia, the Halo wiki
This unidentified Covenant Bomb is an explosive device used by Covenant forces.
Multiplayer
In certain Invasion multiplayer gametypes, an assault phase is included where Sangheili players must detonate a bomb (in a similar fashion as ordinary assault gametypes)to enter a vault. The bomb in this case is of Covenant design, and produces a massive plasma explosion capable of shattering blast doors.
