diff --git a/ClassicAPI.lua b/ClassicAPI.lua
index 5224412..b0897b6 100644
--- a/ClassicAPI.lua
+++ b/ClassicAPI.lua
@@ -286,6 +286,15 @@ function API.GetSpellBonusHealing()
     return GetSpellBonusHealing()
 end
 
+-- Spell haste for `unit` as a percentage: 0 unhasted, positive when casts are
+-- sped up, negative while slowed (Curse of Tongues). 0 for a unit that doesn't
+-- resolve. Vanilla has no haste API at all -- ClassicAPI derives this from the
+-- UNIT_MOD_CAST_SPEED descriptor field the server folds into the cast time, so
+-- it's exact and needs no nampower GetUnitField dependency.
+function API.UnitSpellHaste(unit)
+    return UnitSpellHaste(unit)
+end
+
 --------------------------------------------------------------------------------
 -- Unit Health
 --------------------------------------------------------------------------------
diff --git a/Conditionals.lua b/Conditionals.lua
index 6eb2ae7..5dcf3dc 100644
--- a/Conditionals.lua
+++ b/Conditionals.lua
@@ -3249,6 +3249,25 @@ function CleveRoids.ValidatePowerLost(unit, operator, amount)
     return false
 end
 
+-- Checks the given unit's spell haste percentage vs the given amount
+-- unit: The unit we're checking
+-- operator: valid comparitive operator symbol
+-- amount: The required amount, in percent (0 = unhasted, negative = slowed)
+-- returns: True or false
+-- NOTE: the shared arg parser doesn't accept a sign on the amount, so a
+-- specific negative threshold ([myspellhaste:<-10]) can't be written; use
+-- [myspellhaste:<0] to test for being slowed at all.
+function CleveRoids.ValidateSpellHaste(unit, operator, amount)
+    if not unit or not operator or not amount then return false end
+    local haste = CleveRoids.ClassicAPI.UnitSpellHaste(unit)
+
+    if CleveRoids.operators[operator] then
+        return CleveRoids.comparators[operator](haste, amount)
+    end
+
+    return false
+end
+
 -- Checks whether or not the given unit has hp in percent vs the given amount
 -- unit: The unit we're checking
 -- operator: valid comparitive operator symbol
@@ -6482,6 +6501,30 @@ CleveRoids.Keywords = {
         end, conditionals, "mylevel")
     end,
 
+    myspellhaste = function(conditionals)
+        return Multi(conditionals.myspellhaste, function(args)
+            if type(args) ~= "table" then return false end
+
+            -- Handle multi-comparison (e.g., >50&<80)
+            if args.comparisons and type(args.comparisons) == "table" then
+                local haste = CleveRoids.ClassicAPI.UnitSpellHaste("player")
+
+                -- ALL comparisons must pass (AND logic)
+                for _, comp in ipairs(args.comparisons) do
+                    if not CleveRoids.operators[comp.operator] then
+                        return false
+                    end
+                    if not CleveRoids.comparators[comp.operator](haste, comp.amount) then
+                        return false
+                    end
+                end
+                return true
+            end
+
+            return CleveRoids.ValidateSpellHaste("player", args.operator, args.amount)
+        end, conditionals, "myspellhaste")
+    end,
+
     myhp = function(conditionals)
         return Multi(conditionals.myhp, function(args)
             if type(args) ~= "table" then return false end
diff --git a/MacroErrorChecker.lua b/MacroErrorChecker.lua
index 4074ebb..350a75c 100644
--- a/MacroErrorChecker.lua
+++ b/MacroErrorChecker.lua
@@ -669,6 +669,7 @@ local function validateConditional(conditional, args, action)
         button = true,
         form = true, stance = true,
         level = true, mylevel = true,
+        myspellhaste = true,
         distance = true, nodistance = true,
         swingtimer = true, stimer = true,
         rangedtimer = true, rtimer = true,
@@ -689,7 +690,7 @@ local function validateConditional(conditional, args, action)
     if args and type(args) == "string" then
         local hasHpOrPower = safeStringFind(baseCond, "hp") or safeStringFind(baseCond, "power") or
                             safeStringFind(baseCond, "mana") or safeStringFind(baseCond, "energy") or
-                            safeStringFind(baseCond, "rage") or
+                            safeStringFind(baseCond, "rage") or safeStringFind(baseCond, "haste") or
                             safeStringFind(baseCond, "combo") or baseCond == "stat"
         if hasHpOrPower then
             local hasOperator = safeStringFind(args, "[<>=~]+")