The Sinking City 2 Trident and Obelisk Puzzle Solution
Use the Church notes to set the Obelisk symbols, charge the Trident, and continue through the altar sequence.
Quick Answer
Take the Trident from behind the Church's Star-locked door and place it on the Obelisk. Set the four symbol sections from top to bottom to Serpent Form, Crooked Cross, Spearhead, and Splayed Womb. Let lightning charge all three tips, retrieve it, return it to its original holder, then use the revealed dagger at the altar.