Rotten Crystal Sword

Rotten Crystal Sword

Attack	102 Physical, 66 Magic
Critical	100
Scaling	Str D, Dex E, Int D
Requires	Str 13, Dex 10, Int 15
Effect	Causes slight scarlet rot buildup
Guard	48% physical, 33 guard boost
Type	Straight Sword
Attack Type	Standard/Pierce
Skill	Spinning Slash
FP Cost	6 / 12
Weight	4.5
Upgrades With	Somber Smithing Stones, to +10
Sell Price	200

The Rotten Crystal Sword is a Straight Sword in Elden Ring. It arrives late in the game, in Elphael, Brace of the Haligtree.

The Rotten Crystal Sword is a crystal sword, a feat beyond human craft, that festers with scarlet rot while keeping the Crystalians' magic. It sits in a chest guarded by three Crystalians behind large roots just past the Elphael Inner Wall Site of Grace in Elphael, Brace of the Haligtree. It is essentially the Crystal Sword with slight scarlet rot buildup, slightly lower damage and a much later acquisition, and it keeps the standard straight sword moveset with added magic damage. Like its counterpart it does best on Strength, with Intelligence second, and Spinning Slash's quick spinning hits spread rot to everything around it. It suits a Strength character with some Intelligence, or a sorcerer who wants rot on a melee sword.

How to Get Rotten Crystal Sword Guide

In a treasure chest guarded by three Crystalians in Elphael, Brace of the Haligtree, behind some large tree roots right after the Ephael Inner Wall grace.

Where to find Rotten Crystal Sword Location?

Rotten Crystal Sword map location:

Map credit by Map Genie.

Upgrades

Somber Smithing Stones take it up to +10.

Level	Material	Amount	Attack	Scaling
+1	Somber Smithing Stone [1]	x1	116 Physical, 75 Magic	Str D, Dex E, Int D
+2	Somber Smithing Stone [2]	x1	131 Physical, 85 Magic	Str D, Dex E, Int D
+3	Somber Smithing Stone [3]	x1	146 Physical, 94 Magic	Str D, Dex E, Int D
+4	Somber Smithing Stone [4]	x1	161 Physical, 104 Magic	Str D, Dex E, Int D
+5	Somber Smithing Stone [5]	x1	175 Physical, 113 Magic	Str C, Dex E, Int D
+6	Somber Smithing Stone [6]	x1	190 Physical, 123 Magic	Str C, Dex E, Int D
+7	Somber Smithing Stone [7]	x1	205 Physical, 132 Magic	Str C, Dex E, Int D
+8	Somber Smithing Stone [8]	x1	220 Physical, 142 Magic	Str C, Dex E, Int D
+9	Somber Smithing Stone [9]	x1	235 Physical, 152 Magic	Str C, Dex D, Int D
+10	Somber Ancient Dragon Smithing Stone	x1	249 Physical, 161 Magic	Str C, Dex D, Int D

Skill

Spinning Slash costs 6 / 12 FP. The wielder spins the whole body to slash foes in a wide circle, and an additional input adds two more spins. Small weapons spin quickly, while greatswords, spears, halberds and other large weapons use a slower, sweeping version. The skill cannot be parried.

"Skill favored by dexterous warriors. Slash foes as your body spins. Additional input allows for a follow-up attack."

Suggested Build

Played as a Strength and Intelligence sword, often in the off hand when dual-wielding straight swords, using Spinning Slash's fast spins to apply scarlet rot to groups.

Stats	Strength to 80 for the most attack power, or Strength 45 with Intelligence 45 for a hybrid, Vigor 50, Endurance 24 to 40, Mind 10 to 20
Affinity	Cannot be infused; it keeps its own scaling.
Talismans	Kindred of Rot's Exultation, Shard of Alexander, Starscourge Heirloom

Notes

"Sword fashioned from pure crystal; a deed impossible for a human. It festers with scarlet rot. Enwreathed with powerful magic, its attack scales with intelligence."

All Straight Swords

The table below lists all Straight Swords in Elden Ring.

Name	Physical	Magic	Fire	Light	Holy	Crit. Boost	Weight	Str.	Dex.	Int.	Fai.	Arc.	Sell Price	Skill
Broadsword	117 47.0	0 31.0	0 31.0	0 31.0	0 31.0	100 31	4	D 10	E 10	0	0	0	100	Square Off
Cane Sword	96 41	0 27	0 27	0 27	0 27	100 27	2.5	E 8	D 11	0	0	0	200	Square Off
Carian Knight's Sword	88 36	88 52	0 26	0 26	0 26	100 31	4	D 10	D 10	D 18	0	0	200	Carian Grandeur
Coded Sword	0 13.0	0 22.0	0 22.0	0 22.0	85 58.0	100 27	2.5	0	0	0	B 20	0	200	Unblockable Blade
Crystal Sword	106 44	68 44	0 30	0 30	0 30	100 33	4.5	D 13	E 10	D 15	0	0	200	Spinning Slash
Golden Epitaph	85 25.0	0 15.0	0 15.0	0 15.0	85 40.0	100 30	3.5	D 12	D 10	0	D 14	0	500	Last Rites
Lazuli Glintstone Sword	79 30	94 55	0 25	0 25	0 25	100 30	3.5	D 8	E 9	D 13	0	0	100	Glintstone Pebble
Longsword	110 45.0	0 30.0	0 30.0	0 30.0	0 30.0	100 30	3.5	D 10	D 10	0	0	0	100	Square Off
Lordsworn's Straight Sword	115 45	0 30	0 30	0 30	0 30	110 30	3.5	D 10	D 10	0	0	0	100	Square Off
Miquellan Knight's Sword	105 40	0 28	0 28	0 28	68 40	100 30	3.5	D 11	D 11	0	E 16	0	100	Sacred Blade
Noble's Slender Sword	101 43	0 29	0 29	0 29	0 29	110 30	3.5	E 8	C 11	0	0	0	1000	Square Off
Ornamental Straight Sword	101 42	0 28	0 28	0 28	0 28	110 28	3	E 10	D 14	0	0	0	200	Golden Tempering
Regalia of Eochaid	89 48.0	57 40.0	0 31.0	0 31.0	0 31.0	100 33	5.5	E 12	D 18	0	0	D 15	500	Eochaid's Dancing Blade
Rotten Crystal Sword	102 48	66 38	0 31	0 31	0 31	100 33	4.5	D 13	E 10	D 15	0	0	200	Spinning Slash
Short Sword	102 42.0	0 28.0	0 28.0	0 28.0	0 28.0	100 28	3	D 8	D 10	0	0	0	100	Kick
Stone-Sheathed Sword	119 54	0 33	0 33	0 33	0 33	100 32	5.0	C 16	D 8	0	0	0	100	Square Off
Sword of Darkness	93 26	0 15	0 15	0 15	93 42	100 31	4.0	D 14	E 11	0	E 24	0	1000	Darkness
Sword of Light	93 26	0 15	0 15	0 15	93 42	100 31	4.0	D 14	E 11	0	E 24	0	1000	Light
Sword of Night and Flame	87 36	56 42	56 42	0 26	0 26	100 31	4	E 12	E 12	D 24	D 24	0	1000	Night-and-Flame Stance
Sword of St. Trina	107 39	32 33	0 27	0 27	0 27	100 28	3	D 10	D 12	E 14	0	0	500	Mists of Slumber
Velvet Sword of St Trina	95 37	61 37	0 25	0 25	0 25	100 27	2.5	E 10	D 12	E 14	0	0	500	Mists of Eternal Sleep
Warhawk's Talon	101 42	0 28	0 28	0 28	0 28	100 30	3	D 10	C 16	0	0	0	100	Spinning Slash
Weathered Straight Sword	103 43	0 29	0 29	0 29	0 29	100 27	3.5	D 7	D 10	0	0	0	100	Square Off