Minecraft Ultra is the same vanilla minecraft you are familiar with, but much harder.
WARNING!!! This is a Minecraft hardcore survival experience.
Each time you lose all of your health, a recovery period must pass to allow yourself to heal before you can continue your adventure. This is to encourage and focus the gameplay on survival. PVP is enabled, however the world is awash with danger so decide wisely to make enemies or allies of other players.

Mobs are tougher.

In the overworld, the further you travel from spawn, the tougher the mobs become. The levels will appear over each mob so you can decide how far you are ready to travel to the outer regions of the world which is 64k in each direction from spawn.

WARNING!!! This is a Minecraft hardcore survival experience.