RLCraft Modpack MCPE is said to be the most difficult mod for Minecraft players. When you install this mod, you'll be greeted with powerful mobs and obstacles that are difficult to traverse. 

When you visit the battle tower, you'll need to arm yourself with weapons and prepare beds and bandages. Go ahead and loot all the chests in the tower. And the good news is, you'll obtain much better loot the higher you go in the tower. Enchant your weapons, for they'll help you defeat a huge, powerful dragon. Be prepared and stay alert. 

If your friends are up to the challenge, you can ask them to download RLCraft Modpack MCPE. Who knows? They might like it because it's a breath of fresh air from the usual tree cutting and tool crafting.