After transmuting over 1k of silver mods, farming Eris, Naegler for days, and farming old Anti-Moas, this mod still hasn't dropped. This is absolutely ridiculous, and when I went on old forum threads and the wiki, the drop rate of this mod has been complained about since 2018 with the top suggestion to farm prime warframes and sell them to buy the stupid mod, which is 10 plat, because of how rare it is.
Change the drop rate or change it into a golden mod. This isn't an uncommon drop.