If you cross the seal without defeating it, you will see it again before the entrance to Irithyll Dungeon when you run below the bridge. When defeated it will drop Pontiff's Right Eye. When it spawns again it will still be damaged as long as you do not rest at the bonfire. At this point you can land several hits before it despawns. A way of cheesing it is to run back towards the arch and the creature will begin to despawn. This enemy is intimidating but defeatable by timing its attacks and striking when exposed.
About halfway through a Sulyvahn's Beast will spawn behind you. Continue down the left path and make a right through the arch to traverse the bridge. Here for Lore and Speculation on this location.Īs you enter this snow dusted world, head to your left to light the first Bonfire.