The Big Ice Rock is a trap in Bomberman Hero.
Description[]
They are found in Freeze Lake. These rocks are stuck on the ceiling among other crystals of the background and as soon as the player approaches, they detach from it and move slowly in the direction of the player, dealing damage on contact, and then fall down to the floor where they will be destroyed. They can't be destroyed with bombs, and could be difficult to avoid due to their large size, especially if the player is in the lower part where they would only see them at the last time, so it is best to stay around the upper part in order to anticipate their move.