Ah Darth Maul, a.k.a. Darth NoPenis. I will never understand why so many people accept his absurd return after being cut in half.
It should be established that Maul’s species can reproduce asexually, and like starfish, a pair of Mauls grew from the severed halves. When they appear on-screen together for the first time, you can have a character snap their finger and point, saying “This is getting out of hand! Now there are two of them!” And they can each carry half of a double-bladed lightsaber, each half powered by a split kyber crystal which has been bled extra dry, and when they put the two halves together, they form a superlightsaber which can fire energy beams from both ends capable of blasting holes in the spacetime continuum, forming wormholes to other galaxies, time periods, and universes.