<p>Well, in my opinion this kind of questions are "easily answered by official manual" because it is enough to write the name of the item on every Tibia Wiki and you can check which monsters drop, drop it, but everytime I flag similar questions it is denied so...</p><p>According to tibiopedia.pl:</p><p><a rel="nofollow" href="https://tibiopedia.pl/items/Glowing_Rune">https://tibiopedia.pl/items/Glowing_Rune</a></p><p>You can loot it as a creature product from:</p><p></p><ul><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Animated_Feather"><span class="itemDetLootMonster">Animated Feather</span> <img src="https://tibiopedia.pl/images/static/monsters/animated_feather.gif" alt="monster" title="" class="lootImage"> </a></li><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Biting_Book"><span class="itemDetLootMonster">Biting Book</span> <img src="https://tibiopedia.pl/images/static/monsters/biting_book.gif" alt="monster" title="" class="lootImage"> </a></li><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Brain_Squid"><span class="itemDetLootMonster">Brain Squid</span> <img src="https://tibiopedia.pl/images/static/monsters/brain_squid.gif" alt="monster" title="" class="lootImage"> </a></li><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Energetic_Book"><span class="itemDetLootMonster">Energetic Book</span> <img src="https://tibiopedia.pl/images/static/monsters/energetic_book.gif" alt="monster" title="" class="lootImage"> </a></li><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Energuardian_of_Tales"><span class="itemDetLootMonster">Energuardian of Tales</span> <img src="https://tibiopedia.pl/images/static/monsters/energuardian_of_tales.gif" alt="monster" title="" class="lootImage"> </a></li><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Guardian_of_Tales"><span class="itemDetLootMonster">Guardian of Tales</span> <img src="https://tibiopedia.pl/images/static/monsters/guardian_of_tales.gif" from:</p><p></p><ul><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Animated_Feather">Animated Feather <img alt="monster" title="" src="https://tibiopedia.pl/images/static/monsters/animated_feather.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Biting_Book">Biting Book <img alt="monster" title="" src="https://tibiopedia.pl/images/static/monsters/biting_book.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Brain_Squid">Brain Squid <img alt="monster" title="" src="https://tibiopedia.pl/images/static/monsters/brain_squid.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Energetic_Book">Energetic Book <img alt="monster" title="" src="https://tibiopedia.pl/images/static/monsters/energetic_book.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Energuardian_of_Tales">Energuardian of Tales <img alt="monster" title="" src="https://tibiopedia.pl/images/static/monsters/energuardian_of_tales.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Guardian_of_Tales">Guardian of Tales <img alt="monster" title="Guardian of Tales" class="lootImage"> </a></li><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Knowledge_Elemental"><span class="itemDetLootMonster">Knowledge Elemental</span> <img src="https://tibiopedia.pl/images/static/monsters/knowledge_elemental.gif" src="https://tibiopedia.pl/images/static/monsters/guardian_of_tales.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Knowledge_Elemental">Knowledge Elemental <img alt="monster" title="Knowledge Elemental" class="lootImage"> </a></li><li class="itemDetLootRow"><a rel="nofollow" href="https://tibiopedia.pl/monsters/Rage_Squid"><span class="itemDetLootMonster">Rage Squid</span> <img src="https://tibiopedia.pl/images/static/monsters/rage_squid.gif" alt="monster" title="" class="lootImage"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Squid_Warden"><span class="itemDetLootMonster">Squid src="https://tibiopedia.pl/images/static/monsters/knowledge_elemental.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Rage_Squid">Rage Squid <img alt="monster" title="" src="https://tibiopedia.pl/images/static/monsters/rage_squid.gif"> </a></li><li><a rel="nofollow" href="https://tibiopedia.pl/monsters/Squid_Warden">Squid Warden<img alt="" src="https://tibiopedia.pl/images/static/monsters/squid_warden.gif" style="height:63px; width:48px"></span></a></li></ul>width:48px"></a></li></ul><p>Yo ucan sell it to The Librarian (Issavi) and Yasir for 350 gp.</p>