To generate a Kraken-style phosphine ligand library, we used a combination of our program Polyjuice and OpenBabel and our ReaLigands ligand library. ReaLigands was curated by detaching and classifying all ligands from all mononuclear transition metal complexes in the Cambridge Structure Database (CSD). For this work, we used 1,078 unique monodentate phosphine ligands. On these 1,078 phosphine ligands we used our Polyjuice program, which is a modified depth-first searching algorithm, to detach all organic groups connected to each phosphine. To assemble the large phosphine ligand library, we used the same approach as Gensch et al. and built phosphines with two identical organic groups and one different organic group (i.e., R'R2P). To electronically balance this ligand set, we added select phosphines with three different organic groups as well as phosphines that have two covalent connections to a single organic group and a third independent organic group. OpenBabel was used for all structure conversions.