diff --git a/abms.lua b/abms.lua
index 90e86ec..2d634ee 100644
--- a/abms.lua
+++ b/abms.lua
@@ -298,6 +298,29 @@ minetest.register_abm({
 	end
 })
 
+minetest.register_abm({
+	nodenames = {"fun_caves:casket"},
+	interval = 2,
+	chance = 10,
+	action = function(pos, node)
+		local objs = minetest.get_objects_inside_radius(pos, 7)
+		for i = 1, #objs do
+			if objs[i]:is_player() then
+				local p1 = vector.subtract(pos, 3)
+				local p2 = vector.add(pos, 3)
+				local nodes = minetest.find_nodes_in_area_under_air(p1, p2, {'fun_caves:pyramid_1'})
+				if nodes and #nodes > 0 then
+					if math.random(3) == 1 then
+						minetest.add_entity(nodes[math.random(#nodes)], 'mobs_monster:stone_monster')
+					else
+						minetest.add_entity(nodes[math.random(#nodes)], 'fun_caves:sand_monster')
+					end
+				end
+			end
+		end
+	end
+})
+
 local no_tree_grow = {'fun_caves:bark', 'fun_caves:leaves'}
 local wood_nodes = {{name = 'fun_caves:diamondwood'}, {name = 'fun_caves:ironwood'}, {name = 'fun_caves:sap'}, {name = 'fun_caves:tree'}}
 minetest.register_abm({
diff --git a/mobs.lua b/mobs.lua
index 6007872..c00d9af 100644
--- a/mobs.lua
+++ b/mobs.lua
@@ -637,7 +637,6 @@ if minetest.registered_entities["mobs_monster:sand_monster"] then
 	mobs.spawning_mobs["fun_caves:sand_monster"] = true
 
 	mobs:register_spawn("fun_caves:sand_monster", {"default:sand"}, 20, 0, 4000, 3, -50)
-	mobs:register_spawn("fun_caves:sand_monster", {"fun_caves:pyramid_1"}, default.LIGHT_MAX - 1, 0, 200, 5, 31000)
 
 	mobs:register_egg("fun_caves:sand_monster", "Deep Sand Monster", "default_sand.png", 1)
 end
diff --git a/pyramid.lua b/pyramid.lua
index 0a5a1a3..d2b091c 100644
--- a/pyramid.lua
+++ b/pyramid.lua
@@ -127,8 +127,10 @@ fun_caves.pyramid = function(minp, maxp, data, p2data, area, biomemap, biome_ids
 					else
 						data[ivm] = node['air']
 					end
-				elseif dy >= base_height and dy <= base_height + 40 - math.max(math.abs(dx - 40), math.abs(dz - 40)) then
+				elseif dy >= base_height + 3 and dy <= base_height + 37 - math.max(math.abs(dx - 40), math.abs(dz - 40)) then
 					data[ivm] = node['fun_caves:pyramid_1']
+				elseif dy >= base_height and dy <= base_height + 40 - math.max(math.abs(dx - 40), math.abs(dz - 40)) then
+					data[ivm] = node['default:sandstone_block']
 				end
 
 				ivm = ivm + area.ystride