When mousing over a zone change there will be a minimum level indicator in the tooltip

game/modules/tome/class/Grid.lua

@@ -176,6 +176,30 @@ function _M:tooltip(x, y)
 		tstr:add(true)
 	end
 
+	if self.change_zone then
+		-- Lets make very very sure that funky weird zone files dont explode things
+		local ok, data = pcall(function()
+			local fakezone = {short_name=self.change_zone}
+			local base = engine.Zone.getBaseName(fakezone)
+			local f = loadfile(base.."/zone.lua")
+			if f then
+				setfenv(f, setmetatable({self=fakezone, short_name=fakezone.short_name}, {__index=_G}))
+				local ok, z = pcall(f)
+				return z
+			end
+		end)
+		if ok and data then
+			if data.level_range then
+				local p = game:getPlayer(true)
+				local color = "AQUAMARINE"
+				if p.level <= data.level_range[1] - 10 then color = "CRIMSON"
+				elseif p.level <= data.level_range[1] - 4 then color = "ORANGE"
+				end
+				tstr:add(true, {"font","bold"}, {"color", color}, "Min.level: "..data.level_range[1], {"color", "LAST"}, {"font","normal"}, true)
+			end
+		end
+	end
+
 	if game.level.entrance_glow and self.change_zone and not game.visited_zones[self.change_zone] then
 		tstr:add(true, {"font","bold"}, {"color","CRIMSON"}, "Never visited yet", {"color", "LAST"}, {"font","normal"}, true)
 	end