ogniem

In a sentence

• Ogrzaliśmy się przy ognisku pełnym ognia.

  We warmed ourselves by the bonfire full of fire.

  In this sentence, 'ogniem' represents the element of fire as the direct object of warming.

• Artysta malował ognistym temperamentem.

  The artist was painting with fiery temperament.

  Here, 'ognistym' (adjective form) metaphorically describes the passion of the artist.

• Z kuchni wydobywał się zapach przypalonego jedzenia i dymu spod ognia.

  The kitchen was filled with the smell of burnt food and smoke from the fire.

  In this sentence, 'ognia' (genicive case) implies the specific source of fire.