Heart of the Sea Item. Item Texture by RandomLegoBrick.

mods/ITEMS/mcl_mobitems/init.lua

@@ -336,6 +336,15 @@ minetest.register_craftitem("mcl_mobitems:nautilus_shell", {
 	stack_max = 64,
 })
 
+minetest.register_craftitem("mcl_mobitems:heart_of_the_sea", {
+	description = S("Heart of the Sea"),
+	_tt_help = S("Used to craft a conduit"),
+	_doc_items_longdesc = S("The Heart of the Sea is used to craft a conduit. They can be obtained by finding them in a buried treasure chest."),
+	inventory_image = "mcl_mobitems_heart_of_the_sea.png",
+	groups = { craftitem=1 },
+	stack_max = 64,
+})
+
 local horse_armor_use = S("Place it on a horse to put on the horse armor. Donkeys and mules can't wear horse armor.")
 
 minetest.register_craftitem("mcl_mobitems:iron_horse_armor", {

mods/ITEMS/mcl_mobitems/locale/template.txt

@@ -96,6 +96,8 @@ Place it on a saddled pig to mount it. You can now ride the pig like a horse. Pi
 Nautilus Shell=
 Used to craft a conduit=
 The Nautilus Shell is used to craft a conduit. They can be obtained by fishing or killing a drowned that is wielding a shell.=
+Heart of the Sea=
+The Heart of the Sea is used to craft a conduit. They can be obtained by finding them in a buried treasure chest.=
 
 Iron Horse Armor=
 Iron horse armor can be worn by horses to increase their protection from harm a bit.=