Cosmic rune
“Used for enchant spells.”
Free-to-playTradeable (not for Ironmen)High alch 30 gp
Sources from the OSRS Wiki's drop, shop and recipe data (CC BY-NC-SA 3.0), checked 2026-10-09. Item sprite © Jagex.
As an Ironman: dropped by Thug (level 10), made with 27 Runecraft, sold at Lundail's Arena-side Rune Shop.
Monster drops
| Dropped by | Level | Quantity | Rarity |
|---|---|---|---|
| Zalcano | 336 | 295–926 | 1/36 |
| Corporeal Beast | 785 | 500 | 17/512 |
| Phosani's Nightmare | 1024 | 247–420 | 4/100 |
| Abyssal Sire | 350 | 350 | 4/139 |
| Sarachnis | 318 | 125–150 | 5/100 |
| The Hueycoatl | 642 | 20–400 | 2/68 |
| ThugEasiest | 10 | 2 | 1/128 |
| Skeleton (Catacombs of Kourend) | 22 | 2 | 1/128 |
| Banshee | 23 | 2 | 3/128 |
Best rates first, plus the lowest-level monsters that drop it.
Make it yourself
Needs 27 Runecraft · 8 Runecraft XP
Tools: Cosmic tiara, Cosmic talisman. Where: Cosmic Altar.
Needs 27 Runecraft · 12 Runecraft XP
- Daeyalt essence
Tools: Cosmic tiara, Cosmic talisman. Where: Cosmic Altar.
Shops
- Lundail's Arena-side Rune Shop50 coins · stock 20
- Amlodd's Magical Supplies50 coins · stock 250
- Tal Teklan Rune Shop50 coins · stock 30
- Ali's Discount Wares62 coins · stock 10
- Durrik's Goods125 coins · stock 10
Other sources
- Crystal chest
- Essence impling
- Essence impling jar
- Lundail
- Professor Imblewyn
- Chest (Dorgesh-Kaan Average)
- Professor Onglewip
- Barbarian Assault/Gambles
Minigames, reward chests, clues, skilling and other non-combat sources.