Ruin Sentinel is ruin machines type enemy that can be found in Inazuma region. They are usually can be found in groups and have some different shapes. Ruin Sentinel also appear during Perpetual Mechanical Array boss fight.
4 Types of Ruin Sentinels
All type of Ruin Sentinels are highly sought because of these materials. So far this material is only used for recently released Inazuma weapon and hopefully more weapon in the future:
Ruin Sentinel Farming Locations
There’s not many location where we can found Ruin Sentinels. So far I only can find 4 location, make it 5 if we are counting Leylines in Araumi. Here’s the details:
Araumi, Narukami Island
First area is Araumi in Narukami Island. For location number 1, you can find Sentinel Ruin in the path near underground teleport waypoint. About how to open the location, please read: How to Open Underground Teleport Waypoint in Araumi.
Second location can be found near the ruin. As for third location, it’s depend whether there’s Leyline Outcrop or not.
If you’ve find Leyline Outcrop in the area, whether it’s the blue or yellow one. Open it and 3 or 4 sentinel ruins will appear. You can just defeat them and taking their drop without claiming Leyline Outcrop rewards.
Inside a cave in Kannazuka
Some sentinel ruin can be found inside small cave in Kannazuka. There’s 2 entrance to this cave, first one is hole near Thunder Sakura. Second entrance can be acessed from the beach (check marked location).
First location can be found in Fort Mumei area, you can find 4 sentinel ruins in there. For second location in Serpent Head, it’s located underground. You can open the gate by guiding 2 electro seelies in the area.
As for third location, it’s also located underground. You need to solve puzzle before unlocking the whole area and farm sentinel ruins.