Underwater TNT

Underwater TNT is a block that can be used by the player to initiate a controlled explosion underwater.

Obtaining
Underwater TNT can be broken instantly with any tool, or without a tool. However, primed underwater TNT cannot be broken, as it is an entity.

Usage
Underwater TNT blocks can be activated by the same way as a TNT block.

Behavior
Once activated, it will explode the same way as a TNT block behaves. It can explode underwater unlike the traditional TNT block.