diff --git a/code/game/objects/items/weapons/melee/energy.dm b/code/game/objects/items/weapons/melee/energy.dm
index ac63824ee10..1443ebdc671 100644
--- a/code/game/objects/items/weapons/melee/energy.dm
+++ b/code/game/objects/items/weapons/melee/energy.dm
@@ -30,10 +30,13 @@
 		return (BRUTELOSS|FIRELOSS)
 
 /obj/item/weapon/melee/energy/sword
+	var/hacked = 0
+	var/blade_color
 	color
 	name = "energy sword"
 	desc = "May the force be within you."
 	icon_state = "sword0"
+	icon_override = 'icons/mob/in-hand/swords.dmi'
 	force = 3.0
 	throwforce = 5.0
 	throw_speed = 1
diff --git a/code/game/objects/items/weapons/swords_axes_etc.dm b/code/game/objects/items/weapons/swords_axes_etc.dm
index a0614213ba0..9645d74cf90 100644
--- a/code/game/objects/items/weapons/swords_axes_etc.dm
+++ b/code/game/objects/items/weapons/swords_axes_etc.dm
@@ -24,7 +24,7 @@
 	return 0
 
 /obj/item/weapon/melee/energy/sword/New()
-	_color = pick("red","blue","green","purple")
+	blade_color = pick("red","blue","green","purple")
 
 /obj/item/weapon/melee/energy/sword/attack_self(mob/living/user as mob)
 	if ((M_CLUMSY in user.mutations) && prob(50))
@@ -36,7 +36,7 @@
 		if(istype(src,/obj/item/weapon/melee/energy/sword/pirate))
 			icon_state = "cutlass1"
 		else
-			icon_state = "sword[_color]"
+			icon_state = "sword[blade_color]"
 		w_class = 4
 		playsound(user, 'sound/weapons/saberon.ogg', 50, 1)
 		hitsound = 'sound/weapons/blade1.ogg'
@@ -67,9 +67,29 @@
 				user.adjustBrainLoss(10)
 		else
 			user << "<span class='notice'>You attach the ends of the two energy swords, making a single double-bladed weapon! You're cool.</span>"
-			new /obj/item/weapon/twohanded/dualsaber(user.loc)
+			var/obj/item/weapon/twohanded/dualsaber/newSaber = new /obj/item/weapon/twohanded/dualsaber(user.loc)
+			if(src.hacked) // That's right, we'll only check the "original" esword.
+				newSaber.hacked = 1
+				newSaber.blade_color = "rainbow"
 			del(W)
 			del(src)
+
+	else if(istype(W, /obj/item/device/multitool))
+		if(hacked == 0)
+			hacked = 1
+			blade_color = "rainbow"
+			user << "<span class='warning'>RNBW_ENGAGE</span>"
+
+			if(active)
+				icon_state = "swordrainbow"
+				// Updating overlays, copied from welder code.
+				// I tried calling attack_self twice, which looked cool, except it somehow didn't update the overlays!!
+				if(user.r_hand == src)
+					user.update_inv_r_hand(0)
+				else if(user.l_hand == src)
+					user.update_inv_l_hand(0)
+		else
+			user << "<span class='warning'>It's already fabulous!</span>"
 /*
  * Classic Baton
  */
diff --git a/code/game/objects/items/weapons/twohanded.dm b/code/game/objects/items/weapons/twohanded.dm
index b070240b7af..f909c71ef21 100644
--- a/code/game/objects/items/weapons/twohanded.dm
+++ b/code/game/objects/items/weapons/twohanded.dm
@@ -191,6 +191,9 @@ obj/item/weapon/twohanded/
  * Double-Bladed Energy Swords - Cheridan
  */
 /obj/item/weapon/twohanded/dualsaber
+	var/hacked = 0
+	var/blade_color
+	icon_override = 'icons/mob/in-hand/swords.dmi'
 	icon_state = "dualsaber0"
 	name = "double-bladed energy sword"
 	desc = "Handle with care."
@@ -210,20 +213,14 @@ obj/item/weapon/twohanded/
 	edge = 1
 	no_embed = 1 // Like with the single-handed esword, this shouldn't be embedding in people.
 
-/* Here for when we can add items to left and right hands again, but currently this cannot be done due to the lack of in-hand icons for dual eswords aside from the green one.
 /obj/item/weapon/twohanded/dualsaber/New()
-	item_color = pick("red", "blue", "green", "purple")
+	blade_color = pick("red", "blue", "green", "purple")
 
 /obj/item/weapon/twohanded/dualsaber/update_icon()
 	if(wielded)
-		icon_state = "dualsaber[item_color][wielded]"
+		icon_state = "dualsaber[blade_color][wielded]"
 	else
 		icon_state = "dualsaber0"
-*/
-
-/obj/item/weapon/twohanded/dualsaber/update_icon()
-	icon_state = "dualsaber[wielded]"
-	return
 
 /obj/item/weapon/twohanded/dualsaber/attack(target as mob, mob/living/user as mob)
 	..()
@@ -245,11 +242,19 @@ obj/item/weapon/twohanded/
 
 /obj/item/weapon/twohanded/dualsaber/green
 	New()
-		color = "green"
+		blade_color = "green"
 
 /obj/item/weapon/twohanded/dualsaber/red
 	New()
-		color = "red"
+		blade_color = "red"
+
+/obj/item/weapon/twohanded/dualsaber/purple
+	New()
+		blade_color = "purple"
+
+/obj/item/weapon/twohanded/dualsaber/blue
+	New()
+		blade_color = "blue"
 
 /obj/item/weapon/twohanded/dualsaber/unwield()
 	..()
@@ -259,6 +264,18 @@ obj/item/weapon/twohanded/
 	..()
 	hitsound = 'sound/weapons/blade1.ogg'
 
+/obj/item/weapon/twohanded/dualsaber/attackby(obj/item/weapon/W as obj, mob/user as mob)
+	..()
+	if(istype(W, /obj/item/device/multitool))
+		if(hacked == 0)
+			hacked = 1
+			user << "<span class='warning'>2XRNBW_ENGAGE</span>"
+			blade_color = "rainbow"
+			update_icon()
+		else
+			user << "<span class='warning'>It's starting to look like a triple rainbow - no, nevermind.</span>"
+
+
 //spears
 /obj/item/weapon/twohanded/spear
 	icon_state = "spearglass0"
diff --git a/icons/mob/in-hand/swords.dmi b/icons/mob/in-hand/swords.dmi
new file mode 100644
index 00000000000..c9ce0a84ee0
Binary files /dev/null and b/icons/mob/in-hand/swords.dmi differ
diff --git a/icons/obj/weapons.dmi b/icons/obj/weapons.dmi
index daccc94a722..90c9a61a302 100644
Binary files a/icons/obj/weapons.dmi and b/icons/obj/weapons.dmi differ