@@ -1,2 +1,76 @@
--- resonance is a mechanic whereby items which 'resonate' can be
+-- resonance is a mechanic whereby give which 'resonate' can be
 -- transformed into each other by use of the divide/meld wands
+
+local function
+undersign(signs) return function(ctx)
+	local stars = sorcery.calendar.stars(ctx.today);
+	for _,s in pairs(signs) do
+		if stars.sign.id == s then return true end
+	end
+	return false
+end end
+
+local function
+undermoon(min,max) return function(ctx)
+	local date = sorcery.calendar.date(ctx.today);
+	return date.lunar_phase >= min and date.lunar_phase <= max
+end end
+
+-- TODO: add value annotations, make high spell power prefer items of higher value
+return {
+	divide = {
+		-- remember to check for leftovers!
+		['sorcery:flame_oil'] = {
+			mode = 'random';
+			give = {
+				'sorcery:ash';
+				'sorcery:essence_flame';
+			};
+		};
+		['bucket:bucket_lava'] = {
+			mode = 'random';
+			replacement = 'bucket:bucket_empty';
+			give = {
+				'sorcery:essence_flame';
+				'sorcery:powder_firestorm';
+			};
+		};
+		['sorcery:inferno_crystal'] = {
+			mode = 'set';
+			give = {
+				'sorcery:essence_flame';
+				'sorcery:essence_flame';
+				'sorcery:gem_ruby';
+			};
+		};
+		['default:mese_crystal'] = {
+			mode = 'random';
+			give = {
+				'default:mese_fragment';
+				'sorcery:essence_force';
+			};
+		};
+	};
+
+	meld = {
+		{
+			set = { 'sorcery:gem_ruby', 'sorcery:ingot_lithium', 'tnt:gunpowder' };
+			restrict = undersign {'wyvern','wserpent'};
+			results = { 'sorcery:inferno_crystal' };
+		};
+		{
+			set = {
+				'default:snow', 'default:ice', {
+					take = 'bucket:bucket_water';
+					replacement = 'bucket:bucket_empty';
+				};
+			};
+			results = { 'sorcery:essence_frost' };
+		};
+		-- {
+		-- 	set = { 'sorcery:essence_flame', 'sorcery:essence_frost', 'sorcery:essence_force' };
+		-- 	restrict = undersign {'wolfprince'};
+		-- 	results = (something very powerful?) "Elemental? Dynamo"
+		-- };
+	};
+};