Red Blocks are standard blocks that spawn in the nether. They are a hostile mob and use the apparance of a block to trick players.
Red Blocks, appear as Red wool blocks with a creeper face.
Red Blocks, contain 12 HP and feature fire resistance. They can do a damage of three when a player is hit. When a Red Block is killed, it will dropped Red Wool. They fire bombs at you.
Strategy: attack it from afar.