The Lich

The Lich is a difficult Hardmode boss, that can be summoned at night after crafting a Soul Forge and obtaining Hallowed Bars, Souls of Night and Pumpkins.

While The Lich is alive, the vanilla track Boss 3 will play.

Spawn
The Lich does not spawn on its own, and requires the player to summon it with a Grim Harvest Sigil at night.

Behavior
The Lich flies after nearby players, unleashing dark magical attacks, and ramming into the player for massive damage.

Attacks

 * Rapidly fires flaming eye beams that set the player on fire.
 * Beam increases frequency as the bosses' health drops
 * Periodically chooses between three different attacks.
 * Rains down enormous balls of flame that deal damage to players and set them on fire.
 * Summons a spinning ring of flaming pumpkins that fire at the nearest player.
 * Teleports around the player, firing a spread of shadowy pumpkins at them.

Expert Mode

 * Upon reaching 25% health, the Lich's mask and hood will be torn off and it will pull out a scythe.

In Expert Mode
The Lich (Unmasked) is the Expert Mode only form of The Lich, to which it will transform once it reaches 40% health. It has a variety of new abilities.

Behavior

 * Rushes the nearest player with high speed and damage.
 * Unleashes powerful swings of the Lich's Soul Render, that deal massive damage.
 * Summons enormous balls of flaming spirit-magic above the target player.
 * Fortifies his defense with the summoning of a Phylactery of a Thousand Souls; that increases the Lich's defense greatly and heals him until defeated.

Aftermath

 * Once defeated, the Confused Zombie will start selling Soul Bombs.

Trivia

 * The Lich has been credited as a direct nod to the artist Endling's Pumpkin Lich.