Endermen pick up the following blocks:Cactus.Clay.Coarse Dirt.Rooted Dirt.Dirt.Flowers (short)Fungi.Roots.
7 Answers. Endermen can teleport through any type of block if there is ample space on the other side. What you could do is cover the ground outside with blocks they can not teleport on top of. As far as my understanding goes, the only blocks they can't teleport to are water lava and transparent blocks.
Endermen are 3 blocks tall, so:Make a moat full of water as jsnlxndrlv's answer suggests.Make your house interior shorter than 3 blocks. Not three blocks or less, but no higher than 2 blocks!Make your exterior walls from diamond blocks as chichiwauwa09's answer suggests.
It also cannot be picked up by endermen and cannot be destroyed by the ender dragon.
According to http://www.minecraftwiki.net/wiki/Enderman an enderman can only pick up: grass blocks, dirt, mycelium, sand, gravel clay, dandelions, rose, brown and red mushrooms, cactus, pumpkins, melons, and TNT. Endermen cannot pick up entities, such as boats, minecarts, primed TNT, and mobs.
Moss carpets cannot be picked up by endermen, but moss blocks can.
Why do Endermen pick up blocks? - Quora. Based on MatPat's theory in Game Theory, he suggested that the Endermen were a race of builders similar to Steve and Alex that had to travel to the End due to a catastrophe (That's were the strongholds originated from).
This Enderman may be befriended by giving it gifts (the equivalent of taming a pet). These gifts are pulled from the list of blocks an Enderman can pick up. A common block like dirt is very unlikely to befriend this Enderman, but rarer blocks like Melons, TNT, Podzol, and Red Sand are much more likely.
Enter the same world you would have duplicated the items in. You can continuously duplicate things by repeatedly downloading the character but make sure you put the items in the chest or when you download the character, all of the items you have duplicated will return to the normal amount.
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