In Deltarune terms, the Egg doesn’t seem to do anything major right now; guides and walkthroughs describe it as an item you can keep, display, or carry without any known special effect. If you mean the Spamton-related secret stuff, the big payoff is usually a hidden scene or dialogue rather than a gameplay-changing egg effect.

What people are seeing

Recent coverage around Spamton is focused on secret routes, hidden cutscenes, and ARG speculation, not on the Egg itself becoming a powerful item. So the current community read is basically: the Egg is a mystery item, and Spamton is part of the game’s secret-lore ecosystem.

Practical answer

  • The Egg: no confirmed special battle use yet.
  • Spamton connections: mostly lore, secrets, and alternate scene triggers.
  • Community theory: the Egg may matter later, but that’s still speculation.

Context

If your question is a joke or meme phrase, the safest literal answer is: probably nothing immediate, and definitely not a clear combat effect. If you want, I can turn this into a cleaner “forum-style” explainer with the Spamton angle.