Phantoms attack the player simultaneously

phantoms attack player one by one?

No that is easy to handle. Why not add a feature that the phantoms attack the player all at once?

one from front, behind and even  from the right or left side? This can happen by phantoms if there are 3 of them.

While they do this, they go 20% faster to the player and inflict 3 more hearts on the player.

Make this event rare. Don't want it to happen often.