Task Finder
...
The Third Church of Marika is located south of the Summonwater Falls, on the main road alongside Mistwood. Not only can you pick up a Sacred Tear just like other Churches of Marika, but you'll also be able to grab the Flask of Wondrous Physick with a Crimson Crystal Tear here as well.
There is a Troll roaming the church that you can avoid as long as you don't use the main road. Be sure to head north of the church, up some rocks to kill a Scarab containing an Ash of War - Sacred Blade.