Helkar was one of the two pillars held one of the Two Lamps created to light Middle-earth in an early conception of the legendarium.
Helkar was a great pillar, raised by Melko to house the southern of the Two Lamps fashioned by Aulë to illuminate Middle-earth. The pillar was extremely tall, rising to the stars, and shone like pale blue crystal. Melko claimed that Helkar and its northern twin Ringil were made of a strong, imperishable substance that he had devised; in reality he lied for they were made of ice (a material unknown to the other Valar). Thus, when Aulë's lamps were placed upon them (silver in the north and gold in the south) the ice melted and caused great floods to pour into the seas.