is a Hardmode
event boss that spawns in Wave 7 of the Old One's Army
event, also acting as the final boss of said event. She will not spawn in the event until the player has defeated Golem
- Her attack pattern is similar to Duke Fishron.
- Betsy's attack patterns include swooping down at the player, breathing fire, and circling the area.
- Instead of targeting the crystal, Betsy will always attack the player straight away. If the player is killed, she will then target the crystal.
- Defeating Betsy is the only way to end Wave 7 of the Old One's Army.
- It is recommended to fight Betsy with multiple people, as attempting to fight her solo means that the player is leaving the crystal open for attack.
- Betsy is based off of the dragon boss Betsy from Dungeon Defenders 2.