Dark Star Saber

Mine's bigger now!

The Dark Star Saber is a weapon from the Prime portion of the Aligned continuity family.

The Dark Star Saber is a sword made from pure Dark Energon.

Fiction

Prime cartoon

Megatron, after securing the arm of a Prime, used the Forge of Solus Prime to craft a counterpart to the Star Saber. He managed to do a really good job, too, as the Dark Star Saber shattered its counterpart when the two came to blows. Alpha/Omega