From Destinypedia, the Destiny wiki
The Shieldbreaker is a Scorn Abomination seen in the Dark Monastery Mission after the fourth time it is replayed. It appears in the Harbinger's Seclude with a Scorn squad after two of the three Taken sentinels are slain, and leads the attack against the remaining one's position. It has no special powers and can be slain as one wishes.
- With the release of Beyond Light, The Shieldbreaker had its name changed to a generic Major Deranged Abomination.
List of appearances