King Yolkar

 is an NPC found in the in the. When talking to him and giving him, he will give the player the  Potion Effect for 20 minutes, allowing the player to sneak past the Goblin Queen's guards into the Goblin Queen's Den to obtain the Amber Crystal. Without the effect, using the  points towards him while in the Goblin Holdout.

Trivia

 * His name may be based off of the word yolk, the inner part of an egg, which may explain his constant hunger for Goblin Eggs.
 * The effect can be toggled on and off using Booster Cookie.
 * The effect will disappear when a player with this effect goes into water in the Crystal Hollows.
 * Touching water with the effect outside the Crystal Hollows will not remove the effect.
 * Water in the Crystal Hollows indicates that King Yolkar is nearby, so players can search accordingly.