The ender dragon egg?!

[@ZackaryFord-np1jx]

What was the trapdoor for!?

[@zyptoctm6644]

You can use trapdoor to prone and enter the portal. It's a safer way to get into that portal....or you can just use the ender eye to teleport inside the portal, but it's not safe cz you can tp anywhere and fall down... I used the trapdoor in the elytra video you can check that