The dragon egg is only used for building purposes, or to show off to your friends within a server. That’s it! ... You need 1 blaze powder and 1 ender pearl to craft one.

The Dragon Egg in Minecraft 1.19 update is an ultra-rare item and block that is only obtainable when players defeat the Ender Dragon, the game's final boss.

The Ender Dragon egg doesn't do anything - it's little more than a trophy at this stage. It's also quite finicky to collect, as the moment you click on it the egg teleports away.