diff --git a/code/game/objects/items/holy_weapons.dm b/code/game/objects/items/holy_weapons.dm
index 44121d64d1..eda1016b46 100644
--- a/code/game/objects/items/holy_weapons.dm
+++ b/code/game/objects/items/holy_weapons.dm
@@ -769,12 +769,30 @@
 	STOP_PROCESSING(SSobj, src)
 	. = ..()
 
+/obj/item/nullrod/tribal_knife/pickup(mob/user)
+	. = ..()
+	reroll()
+
 /obj/item/nullrod/tribal_knife/process()
-	slowdown = rand(-2, 2)
+	reroll()
+
+/obj/item/nullrod/tribal_knife
 	if(iscarbon(loc))
 		var/mob/living/carbon/wielder = loc
 		if(wielder.is_holding(src))
-			wielder.update_equipment_speed_mods()
+			wielder.add_or_update_variable_movespeed_modifier(/datum/movespeed_modifier/item/arrythmic_knife, multiplicative_slowdown = pick(-10, 0, ((10 / max(wielder.cached_multiplicative_movespeed, world.tick_lag) - 3) / 10))
+
+/obj/item/nullrod/tribal_knife/dropped(mob/user)
+	user.remove_movespeed_modifier(/datum/movespeed_modifier/item/arrhythmic_knife)
+	return ..()
+
+/datum/movespeed_modifier/item/arrhythmic_knife
+	variable = TRUE
+	flags = IGNORE_NOSLOW
+	movetypes = ~FLOATING
+	priority = 750
+	absolute_max_tiles_per_second = 20
+	max_tiles_per_second_boost = 3
 
 /obj/item/nullrod/pitchfork
 	icon_state = "pitchfork0"