Summoning Altars come in many forms all summon frighting 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
• https://wiki.lycanitesmobs.com/creatures:chupacabra#phosphorescent_chupacabra

Boss Altars:

• Rahovart
• Asmodeus
• Amalgalich