Seth

Seth is a Late-Hardmode boss intended to be fought after Golem, he is incredibly difficult, but the loot will help immensely if Seth is defeated.

While Seth is alive, his own music, "Sunstorm" will play.

Spawn
Seth does not spawn on its own, and requires the player to summon him with Pandora's Cup.

Alternatively his ultimate form can be summoned with the Olympic Torch.

Behavior
Seth with generally remain above the player, dashing left and right to make it harder to dodge his attacks. At 50% HP, he will begin using Heat Snaps.

His ultimate form has reduced attack cooldown and all attacks will instakill.

Attacks
When the fight starts, Seth will fly above the player and remain dormant for a bit. Then, he will un-sheath his sword and the fight will start.

During the fight, Seth will fly around the screen and attack using the following attack cycle:


 * Floats above the player and slash his sword, firing nine Fiery Knives that are telegraphed by lines. He will do this four times.

After this attack, he will perform one of the following attacks at random:


 * Fire a stream of Void Knives.
 * Fires 5 spread of Void Knifes 5 times.
 * Fire ten Ash Spiral, which home in on the player. When using this attack Seth has a chance to charge at you. At the end of this attack, he has a chance to either fire a portal which homes in and try to suck the player.
 * After this, the cycle will repeat.

Phase 2
Phase 2 happens when Seth reaches 50% HP, he will immediately start the phase with Heat Snaps. Alongside this, the delay between attacks will be shorter, and his Void Knife attack will happen seven times instead of 4.

After the Heat Snaps, the fight will resume as normal, with a chance for Heat Snaps to happen after every attack.
 * Seth fires 6 / Heat Snaps 6 times in all directions that are telegraphed by line. The heat snap will rotate clockwise or counter clockwise and Seth can reverse the direction during this attack. When doing this attack Seth will remain invulnerable until the attack ends. This attack will instantly kill the player. He has a chance to do this attack after the Fiery Knifes attack.

Tips

 * Heat Snaps always hit the same place (more or less), but Seth constantly moves towards the player while the attack is happening, so it's recommended to use the UFO mount or anything else that offers you infinite flight and keep moving away from Seth while being in a safe spot.

Trivia

 * There is an unused "animation" of Seth spawning on his own or in a similar way to how Spirit spawns. First everything turns red, similar to the effect of a blood moon, and a dark red text appears saying "The sunstorm is approaching...". Sunstorm (Seth's Theme) build-up will play. When it ends, Seth spawns.

Lore

 * According to Vulcan, Seth is a living structure made of bones and stones by him, to get rid of and shift Paraffin's focus. To gain her attention, he made Seth strong, hot and came up with a crazy epic lore. However, even with his patience, he couldn't stand her shenanigans, and came to Vulcan, exhausted and depressed. Vulcan was about to make another living statue, but then realised that he spent all his living flame on Seth and Paraffin. Later that night, Seth broke into Vulcan's floor, ripped his flame out of his chest in the most dramatic way possible, put it back in the cup and tied it with chains into a knot, leaving only a pile of stones behind. Afterwards, he disappeared, causing Paraffin to go in a rage.