Cursa

Cursa is the main antagonist in the game Mario + Rabbids Sparks of Hope. She is an entity that wants to consume Sparks and spread matter known as Darkmess across the galaxy, which she uses to drain the Sparks of their power. Cursa is large, imposing, and covered in a purple cloak with a spiral shape on her face, and possesses floating human-like hands. Underneath her cloak, she has a red, menacing eye which changes to blue whenever Rosalina takes control.

Cursa was created by a fragment of the Megabug, the main antagonist of Mario + Rabbids Kingdom Battle. After the fragment mutated with stellar debris, it gained sentience. It fed on the life energies of the galaxy, eventually transforming into Cursa. Later on, Cursa was drawn to the Comet Observatory, where it would attack Rosalina and some Rabbids and Lumas that were there. While Rosalina was fending off Cursa, the Rabbids and Lumas merged together to create a powerful new species, Sparks. Rosalina had also merged with Cursa. Although Cursa was in control, Rosalina tried to rebel against her. Cursa then created an army of corrupted Rabbids and controlled minions of Bowser, along with the Spark Hunters to lead them.

Memories bio
''There is no question that Cursa is more powerful, cunning, and relentless than any single one of us, yet together - with aid from Rosalina - it was vanquished. Still, its corrupting influence reached every corner of the galaxy, where much of it lingers still. We have stopped the Darkmess at its source, but we have much work to do if we are to remove the rest before it can cause any more harm.''