Naxxramas: WoW Forever Raid

Naxxramas is a 40-player raid in the WoW Forever beta client (build 1.60.1.70338), with 15 boss encounters in the client's own order.
Instance Map
The Adventure Guide’s own map of Naxxramas (5 maps), from the game files.
Naxxramas

Naxxramas

Naxxramas

Naxxramas

Naxxramas

Anub'Rekhan
Encounter 1 of 15 in Naxxramas, DungeonEncounter id 1107. Creature display shared with the Forever client: Anub'Rekhan (15931).
Grand Widow Faerlina
Encounter 2 of 15 in Naxxramas, DungeonEncounter id 1110. Creature display shared with the Forever client: Grand Widow Faerlina (15940).
Maexxna
Encounter 3 of 15 in Naxxramas, DungeonEncounter id 1116. Creature display shared with the Forever client: Maexxna (15928).
Noth the Plaguebringer
Encounter 4 of 15 in Naxxramas, DungeonEncounter id 1117. Creature display shared with the Forever client: Noth the Plaguebringer (16590).
Heigan the Unclean
Encounter 5 of 15 in Naxxramas, DungeonEncounter id 1112. Creature display shared with the Forever client: Heigan the Unclean (16309).
Loatheb
Encounter 6 of 15 in Naxxramas, DungeonEncounter id 1115. Creature display shared with the Forever client: Loatheb (16110).
Instructor Razuvious
Encounter 7 of 15 in Naxxramas, DungeonEncounter id 1113. Creature displays shared with the Forever client: Instructor Razuvious (16582) and Death Knight Understudy (16539).
Gothik the Harvester
Encounter 8 of 15 in Naxxramas, DungeonEncounter id 1109. Creature display shared with the Forever client: Gothik the Harvester (16279).
The Four Horsemen
Encounter 9 of 15 in Naxxramas, DungeonEncounter id 1121. Creature displays shared with the Forever client: Baron Rivendare (10729), Thane Korth'azz (16155), Lady Blaumeux (16153) and Sir Zeliek (16154).
Patchwerk
Encounter 10 of 15 in Naxxramas, DungeonEncounter id 1118.
Grobbulus
Encounter 11 of 15 in Naxxramas, DungeonEncounter id 1111. Creature display shared with the Forever client: Grobbulus (16035).
Gluth
Encounter 12 of 15 in Naxxramas, DungeonEncounter id 1108. Creature display shared with the Forever client: Gluth (16064).
Thaddius
Encounter 13 of 15 in Naxxramas, DungeonEncounter id 1120. Creature display shared with the Forever client: Thaddius (16137).
Sapphiron
Encounter 14 of 15 in Naxxramas, DungeonEncounter id 1119.
Kel'Thuzad
Encounter 15 of 15 in Naxxramas, DungeonEncounter id 1114. Creature display shared with the Forever client: Kel'Thuzad (15945).
3D Model
First-party render from the game files. Model © Blizzard Entertainment.
Kel'Thuzad: creature display 15945, which the Forever beta client carries on the same model.
Compared with Classic Era
The Classic Era client (1.15.9.70003) lists the same 15 encounters under the same ids and names, with the same player cap.