The MK1 Kunai, the type of weapon you give to an actual naruto fan who started their playthrough with Mag. (2.5 status/ 10) If you build these things for status and crit they aren't as bad, you just have to put a potato on them Orokin Reactor. But if you're just looking for MR fodder just buy all of the MK weapons for the MR points and the affinity if you have troubles with that. Be sure to take a look at my other builds, and if your a new player be sure to check out this playlist showcasing all warframe weapons and the damage types. On another note, not all of the most recent weapons are not in the videos. I also recommend looking at the vault status of all prime variants in the second link below. If you want information on the quests and the requirements, I recommend looking on the actual Warframe website under the game dropbox to look at the warframe profile videos as well as looking at the quest guide and the faction types. Click the third link below if you are interested.

Playlist:
https://youtube.com/playlist?list=PLJUc0Kvmv-PX6pGIdMmq0eXa-jY2y0JuU

Wiki:
https://warframe.fandom.com/wiki/Prime

Warframe website:
https://www.warframe.com