This is a list of bosses that in Concordia has killed so far.
Anub'Rekhan – DEAD – 30th November 08
Grand Widow Faerlina – DEAD – 30th November 08
Maexxna – DEAD – 30th November 08
Patchwerk – DEAD – 30th November 08
Grobbulus – DEAD – 1st December 08
Gluth – DEAD – 1st December 08
Thaddius – DEAD – 1st December 08
Instructor Razuvious – DEAD – 30th November 08
Gothik the Harvester – DEAD – 7th December 08
The Four Horsemen – DEAD – 7th December 08
Noth the Plaguebringer – DEAD – 7th December 08
Heigan the Unclean – DEAD – 7th December 08
Loatheb – DEAD – 7th December 08
Sapphiron – DEAD – 8th December 08
Kel'Thuzad – DEAD – 8th December 08
Sartharion – DEAD – 26th November 08
Malygos – DEAD – 16th December 08
Anub'Rekhan – DEAD – 4th January 09
Grand Widow Faerlinab – DEAD – 4th January 09
Maexxnab – DEAD – 4th January 09
Patchwerk – ALIVE
Grobbulus – ALIVE
Gluthb – ALIVE
Thaddiusb – ALIVE
Instructor Razuvious – ALIVE
Gothik the Harvester – ALIVE
The Four Horsemen – ALIVE
Noth the Plaguebringer – DEAD – 4th January 09
Heigan the Unclean – DEAD – 4th January 09
Loatheb – DEAD – 4th January 09
Sapphiron – ALIVE
Kel'Thuzad – ALIVE
Sartharionb – ALIVE
Malygos – ALIVE