How To Fight Fortissax: The Ultimate Strategy Guide For Elden Ring
Defeating Lichdragon Fortissax requires a calculated approach to managing Lightning status effects, closing distance against his sweeping melee combos, and capitalizing on his vulnerability to Status Ailments and physical head strikes. Mastering his delayed spellcasting cadence and equipping holy-resistant gear are the critical benchmarks for securing victory in the Deeproot Depths.
Pre-Operation & Strategic Preparation Checklist
Before stepping into the arena to confront Lichdragon Fortissax, proper logistical preparation is essential to survive his devastating magic and physical onslaught. Because this encounter takes place deep within Fia's dreamscape, you cannot use your Spirit Ash summons immediately or change your loadout mid-fight without dying and resetting.
- Essential Gear and Consumables: Equip the Haligdrake Talisman +2 or Pearl Drake Talisman to mitigate massive Lightning and Holy damage. Pack Boluses to clear Lightning Scourge if your vigor requires it, and utilize heavy-hitting physical weapons or magic that scales with Faith or Intelligence.
- Prerequisite Knowledge and Lore Triggers: You must complete Fia, Deathbed Companion's questline, reaching the Deeproot Depths by defeating the Valiant Gargoyles and riding the coffin waterfall. Speak to Fia repeatedly until she asks you to hold her, and present the Cursemark of Death (obtained by exploring the Divine Tower of Liurnia) to initiate the dream battle.
- Combat Metrics and Benchmarks: Aim for a minimum Character Level of 80 to 100, with a Vigor stat of at least 40 to survive his AoE lightning shockwaves. Weapon upgrade levels should be at maximum (Smithing Stone +24/+25 or Somber +9/+10) to ensure high DPS windows.
Step-by-Step Lichdragon Fortissax Execution Workflow
Step 1: Navigating the Opening Roar and Initial Positioning
As you load into the ethereal arena, Fortissax will remain stationary for a few seconds before unleashing a massive lightning roar. Sprint immediately toward his left or right flank rather than charging the head directly.
Warning: Do not lock your camera onto his head immediately during the opening sequence, as the violent camera movement will disorient your spatial awareness and obscure incoming ground lightning strikes.
Step 2: Exploiting Melee Windows During Ground Combos
Fortissax relies heavily on sweeping claw attacks, tail whips, and slamming his massive red-lightning-infused sword into the earth. Dodge-roll into his forward claw swipes to position yourself safely beneath his torso or beside his rear legs.
- Watch for his dual-sword slam, which leaves his skull resting on the ground for approximately three seconds.
- Sprint or dodge to the front of his head during this recovery window and unleash fully charged heavy attacks or a weapon skill.
- Deal consecutive heavy head strikes to trigger a stance break, opening him up for a devastating critical riposte.
Pro-Tip: Fortissax takes extra posture and physical damage when struck directly in the head, making ranged spells like Rock Sling or targeted melee jump attacks exceptionally effective compared to hacking at his ankles.
Step 3: Countering Death Lightning and Airborne Phases
At roughly 60% health, Fortissax will take to the air and rain down red lightning spears that leave lingering death blight or lightning pools on the arena floor. When he flies upward, unlock your camera and run in wide circles around the perimeter of the arena to avoid tracking projectiles.
- Keep your eyes on the ground to spot the glowing red telegraph circles indicating where lightning strikes will materialize.
- Once he dives back down with a massive shockwave, jump rather than roll to cleanly avoid the ground-based electrical ripple.
- Immediately close the distance using Torrent-free sprinting to punish his landing recovery before he chains into a spellcasting animation.
How Elden Ring's Lichdragon Fortissax Became a Key Character in the Lore
Lichdragon Fortissax Technical Parameters & Resistance Matrix
| Damage Type / Attribute | Fortissax Resistance / Vulnerability | Optimal Counter-Strategy |
|---|---|---|
| Physical Damage | Moderate Resistance | Prioritize Strike or Standard damage targeting the head hitbox. |
| Lightning Damage | Extremely High Resistance | Avoid all lightning incantations and gear; use lightning-negating armor. |
| Holy Damage | Moderate Resistance | Effective lore-wise, but physical or elemental alternatives often yield higher DPS. |
| Scarlet Rot | Highly Vulnerable | Apply Rot Breath or Rotten Grease early to melt health pools over time. |
| Hemorrhage (Bleed) | Vulnerable | Fast-hitting katanas or curved swords will trigger repeated blood loss chunks. |
Common Combat Failures and Field Fixes
- Root Cause: Getting instantly killed by the lingering red lightning bolts that spawn after his spellcasts.
- Actionable Fix: Adjust your positioning to fight near the outer edges of the arena rather than the center, ensuring you have clear escape vectors away from static electrical hazards.
- Root Cause: Inability to close distance against his relentless airborne and teleportation maneuvers.
- Actionable Fix: Stop trying to chase him across the map; instead, adopt a defensive stance, bait his diving charge attack, and punish him during his lengthy recovery frames.
- Root Cause: Accumulation of Death Blight status leading to unpreventable death.
- Actionable Fix: Equip gear with high Stasis/Immunity resistance, and immediately roll away from the dark purple mist clouds he summons during his spell phases.
Frequently Asked Questions
Can I summon help or spirits for the Fortissax fight?
Yes, you can summon Spirit Ashes once the battle officially begins inside Fia's dream. Legendary summons like Mimic Tear or Black Knife Tiche perform exceptionally well by distracting the dragon and dealing heavy passive damage.
What is the best weapon to use against Fortissax?
Weapons that inflict Hemorrhage (such as Rivers of Blood or dual Scavenger's Curved Swords) or heavy strength weapons capable of stance-breaking his head (like the Giant-Crusher) yield the fastest and most reliable kill times.
Why is my lightning damage not working on Fortissax?
Fortissax is a dragon deeply tied to the ancient dragon cults, granting him innate, overwhelming resistance to all lightning-based attacks. Switch to physical, magic, or status-inflicting weaponry to bypass his defenses.
Do I lose anything if I fail to defeat Fortissax on the first try?
No, failing the encounter simply respawns you outside Fia's resting spot in the Deeproot Depths. You can re-enter the dreamscape immediately without losing runes or progression.
Master the rhythm of the Deeproot Depths and claim your rightful place among the Elden Lords by perfecting your boss strategy today.
