Summoning Altars come in many forms, all summon frightening creations from the depths of the void, but some are more deadly than others.

Challenge Altars:

• Umber Lobber
• Lunar Grue
• Celestial Geonach
• Ebon Cacodemon
• Mottled Abaia
• Crimson Epion
• Royal Archvile
• Phosphorescent Chupacabra

Boss Altars:

• Rahovart
• Asmodeus
• Amalgalich