Ospawn

Ospawns are king spawn variants that have a 1/1,000 chance to be spawned during the fight with the Penance King in the final wave of Barbarian Assault hard mode. They function identically to standard king spawn, possessing only a different name and examine text.

If they touch the player, they explode and deal 25% of maximum health as damage in an area. If one is killed when a player is near it, the same damage is dealt. Due to their high explosion damage and very low health, it is recommended for players to take them out at range.

Trivia

 * They are a reference to Mod Ollie stating that a queen spawn with Mod Osborne's face was Mod Osborne's true form on twitter.