The Spiked Slime is summoned by the King Slime in Expert Mode. They are summoned with Blue Slimes by the King Slime. They have the ability to shoot spikes at the player.
- As they are exclusively found as part of the fight with King Slime, they are similarly unaffected by Royal Gel's immunity, and will continue to fire projectiles and damage the player on contact.
- Although it is impossible to encounter a Spiked Slime on a normal world (without the use of hacks), it will still have 50 HP instead of 100.