diff --git a/Spotter.lua b/Spotter.lua
new file mode 100644
index 0000000..9c827b7
--- /dev/null
+++ b/Spotter.lua
@@ -0,0 +1,59 @@
+---@type HeimdallData
+local _, data = ...
+
+local function FormatHP(hp)
+	if hp > 1e9 then
+		return string.format("%.1fB", hp / 1e9)
+	elseif hp > 1e6 then
+		return string.format("%.1fM", hp / 1e6)
+	elseif hp > 1e3 then
+		return string.format("%.1fK", hp / 1e3)
+	else
+		return hp
+	end
+end
+
+---@param unit string
+---@return string?
+local function NotifySpotted(unit)
+	print(unit)
+	local name = UnitName(unit)
+	local race = UnitRace(unit)
+	local hp = UnitHealth(unit)
+	local maxHp = UnitHealthMax(unit)
+
+	if not name then return string.format("Could not find name for unit %s", tostring(unit)) end
+	if not race then return string.format("Could not find race for unit %s", tostring(unit)) end
+	if not hp then return string.format("Could not find hp for unit %s", tostring(unit)) end
+	if not maxHp then return string.format("Could not find maxHp for unit %s", tostring(unit)) end
+
+	local msg = string.format("%s (%s) - %s/%s", name, race, FormatHP(hp), FormatHP(maxHp))
+	print(msg)
+end
+
+local frame = CreateFrame("Frame")
+frame:RegisterEvent("NAME_PLATE_UNIT_ADDED")
+frame:RegisterEvent("TARGET_UNIT_CHANGED")
+frame:SetScript("OnEvent", function(self, event, unit)
+	local name = UnitName(unit)
+	if name and UnitIsPlayer(unit) then
+		local race = UnitRace(unit)
+		local doNotify = true
+		if data.config.spotter.allyOnly then
+			doNotify = false
+			if data.raceMap[race] == "Alliance" then
+				doNotify = true
+			end
+		end
+		-- Stinkies overwrite allyOnly
+		if data.config.spotter.stinkyOnly then
+			doNotify = false
+			if data.stinkies[name] then
+				doNotify = true
+			end
+		end
+		if doNotify then
+			NotifySpotted(unit)
+		end
+	end
+end)