Asterism Arcanum Addon For Irons Spells And Spellbooks FAQ
10 questions players actually ask, answered.
How do I find an Astral Observatory?
Astral Observatories generate on top of tall mountains, so climb to high peaks and look for the distinctive stone structure with a green dome. You can also use the Sniffer to dig up 
Mothspawn eggs in mountainous terrain as an alternative way to access astral content.
Mothspawn eggs in mountainous terrain as an alternative way to access astral content.Where do I get 
Dragonfly Wings?
Defeat the hostile Dragonflies that guard the abandoned Astral Observatories—they drop their wings when killed. You'll need these wings to craft astral spells and special building blocks like 
Lumine.
Lumine.Can I ride Lunar Moths and how?
Yes, Lunar Moths spawn naturally on steep mountain peaks or hatch from Mothspawn eggs that Sniffers dig up. Once you have a moth, you can ride it as a mount, or use the Lunar Moth spell to summon one to protect you in combat.
Mothspawn eggs that Sniffers dig up. Once you have a moth, you can ride it as a mount, or use the Lunar Moth spell to summon one to protect you in combat.What's the difference between an Astrolabe and a regular spellbook?
The Astrolabe works exactly like a normal spellbook from Iron's Spells and Spellbooks—it's simply the item you hold to cast astral spells. It functions as your main magical focus for the Astral School.
How do I use astral spells if I'm new to Iron's Spells?
Hold the Astrolabe in your hand and follow the keybinds for Iron's Spells and Spellbooks (usually right-click to cast). Each spell has different effects—some teleport you, some push enemies away, and others deal damage or protect allies.
What does Celestial Tether do and when should I use it?
Celestial Tether locks you in place (even in mid-air) and blocks all incoming damage, making it ideal for surviving heavy attacks or giving yourself time to heal. Use it when you're overwhelmed or need a defensive breather.
Can I use Mothspawn eggs as weapons?
Yes, you can throw Mothspawn eggs to hatch new moths or apply effects to enemies, giving them utility beyond just breeding. This makes them useful both for building your moth army and for combat situations.
Mothspawn eggs to hatch new moths or apply effects to enemies, giving them utility beyond just breeding. This makes them useful both for building your moth army and for combat situations.Is the Astral School good for beginners?
Yes—the Astral School is designed for players who prefer staying at range and avoiding damage through dodging and teleportation rather than tanking hits. Spells like Astral Echo and Brightburst make it easy to keep enemies at a distance.
Do Astral spells work with other Iron's Spells mods and addons?
Asterism Arcanum is built as an addon for Iron's Spells and Spellbooks, so it integrates with the base mod's mechanics and should work alongside other compatible addons. Check mod compatibility lists if you're using multiple spell-related mods.
What's the best way to farm Dragonfly Wings early on?
Head to the nearest Astral Observatory on a tall mountain and clear out the Dragonflies inside—they respawn, so you can farm them repeatedly. Bring defensive spells or armor to handle multiple dragonflies at once.