Yay, reference explaining time!
This egg is a reference to the invulnerability powerup in Doom. I wanted to make it animated but got too lazy.
And this one holds the code to the secret level of the first episode of Blood - dagger, eye, moon. (Don't look up Blood if you don't like blood and scary stuff, that game can be nightmare fuel.) It's also the order of the keys picked up in the level, which itself is a hint for the code. I purposefully made the eye more draconic because a human eye would look too creepy.