Negima!?, Mahou Shoujo Madoka★Magica Recommendations
They are both by Shaft so have similar styled animation and visual settings. The format is also similar where the protagonists go into dark voids and fights off some sort of evil being in the void and restores the area. One of the only significant differences is that Negima!? has a lot of comically moments as Madoka Magica remains serious all the time.