The second expansion for Descent, adding new monsters, heroes, features, and abilities.

From the FFG product page:

Long ago, foolish men worshiped a malevolent power that lurked just beyond the edge of the light. Now, they work to awaken their dark master once more. If they succeed, it will mean the end of all you hold dear. So, while lesser men quail in terror, you must take up arms to defend the world against those who would enslave it forever.

The dangers that lie ahead of you are not for the faint of heart. Deadly crushing walls, unspeakable curses, and assassins cloaked in shadow will try to claim your life long before you ever reach the corrupted temples of Zorek. However, if you're lucky enough, you just might find some help in unexpected places.

Descent: the Altar of Despair includes more than two dozen new plastic miniatures, featuring six new heroes and five new kinds of monsters. Heroes have powerful new skills and treasures to discover, while the Overlord gains a host of deadly new tricks and tactics, including dark glyphs and relics.

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Components:

• Rulebook
• 6 Hero Sheets
  • Kirga
  • Sahla
  • Eliam
  • Tahlia
  • Aurim
  • Corbin
• 6 Plastic Heroes
• 21 Plastic Monsters
  • 6 Plastic Blood Apes
  • 6 Plastic Dark Priests
  • 3 Plastic Deep Elves
  • 3 Plastic Trolls
  • 3 Plastic Chaos Beasts
• 110 Cards
  • 10 Monster Reference Cards
  • 49 Overlord Cards
  • 4 Subterfuge Skill Cards
  • 4 Fighting Skill Cards
  • 4 Wizardry Skill Cards
  • 5 Town Store Cards
  • 12 Copper Treasure Cards
  • 10 Silver Treasure Cards
  • 6 Gold Treasure Cards
  • 5 Dark Relic Cards
  • 1 Replacement Descent: Journeys in the Dark Card
• 8 Map Pieces
  • 2 Corrupted Room Pieces
  • 2 Corrupted Corridor Pieces
  • 1 Corrupted Intersection Piece
  • 3 Corrupted Dead End Pieces
• 48 Prop Markers
  • 30 Obstacle Markers
  • 2 Glyph Markers
  • 6 Dark Glyph Markers
  • 6 Altar Markers
  • 1 Large Pit Marker
  • 2 Encounter Markers
  • 3 Crushing Wall Markers
• 4 Crushing Wall Plastic Stands
• 28 Effect Tokens
  • 14 Curse Tokens
  • 14 Frost Tokens
• 18 Treasure Markers
  • 9 Invulnerability Potion Markers
  • 9 Money Tokens
• 15 Progress Tokens
• 4 Prolonged Action Hero Order Tokens
• 7 Miscellaneous Markers
  • 1 Sharr the Brightwing Marker
  • 1 Shadow Soul Marker
  • 1 Bottle Imp Marker
  • 1 Eyes of Thara Marker
  • 3 Monkey Markers