Why Song of the Elves?

Song of the Elves is a Grandmaster quest that unlocks Prifddinas, the Crystal City. This is arguably the most important quest in OSRS because it grants access to the Corrupted Gauntlet (Bowfa grind), Elf Thieving (2-3M/hr), Zalcano (skilling boss), and Crystal equipment.

Requirements

Stats: 70 Agility, Construction, Farming, Herblore, Hunter, Mining, Smithing, Woodcutting
Quests: Mourning End Part 2, Making History, and many prerequisite quests
Combat: Moderate (must defeat Fragment of Seren)

The Boss: Fragment of Seren

The final fight against the Fragment of Seren has several phases:

Ranged phase: Pray Ranged, attack with melee or ranged
Magic phase: Pray Magic, dodge the falling crystals
Healing phase: Kill the healing pillars before Seren heals too much
Final phase: DPS race. Use your strongest special attacks

Gear: Best melee gear, Abyssal Whip/Dragon Scimitar, Brews, Restores. The fight is not extremely hard with proper prayers.

What Prifddinas Unlocks

Corrupted Gauntlet: Zero-supply boss for Bowfa (100M+ weapon)
Elf Thieving: 2-3M GP/hr at 91+ Thieving
Zalcano: Skilling boss for Mining, Smithing, RC XP + GP
Crystal equipment: Bowfa, Crystal armor, Crystal tools
Private Chin spot: No competition for Red Chinchompas
Several teleports and shortcuts

Tips

Mourning End Part 2 is the hard part. Use the RuneLite quest helper. The light puzzle is infamous but manageable with a guide.
Get 70 in required stats before starting. Some can be boosted but its easier to train normally.
The quest chain is long. Budget 10-15 hours for all prerequisite quests plus SoTE itself.

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