Organized by the auto-sort order of Ninja Tools. Use this table to see exactly which tool you're missing. Or as a quick reference of tools to their corresponding Ninjutsu or effects.
Tool Ninjutsu Level Spell-Specific Universal Spell Effect Ichi Ni San Uchitake Inoshishinofuda Katon: Ichi, Ni, San Fire Damage + Reduced Water Resistance 15 40 75 (merit) Tsurara Hyoton: Ichi, Ni, San Ice Damage + Reduced Fire Resistance 15 40 75 (merit) Kawahori-Ogi Huton: Ichi, Ni, San Wind Damage + Reduced Ice Resistance 15 40 75 (merit) Makibishi Doton: Ichi, Ni, San Earth Damage + Reduced Wind Resistance 15 40 75 (merit) Hiraishin Raiton: Ichi, Ni, San Lightning Damage + Reduced Earth Resistance 15 40 75 (merit) Mizu-Deppo Suiton: Ichi, Ni, San Water Damage + Reduced Lightning Resistance 15 40 75 (merit) Soshi Chonofuda Aisha: Ichi Attack Down 78 n/a n/a Jinko Yurin: Ichi Reduces enemy's TP Gain 83 n/a n/a Jusatsu Jubaku: Ichi Paralyze 30 n/a n/a Kaginawa Hojo: Ichi, Ni Slow 23 48 n/a Sairui-Ran Kurayami: Ichi, Ni Blind 19 44 n/a Kodoku Dokumori: Ichi Poison 27 n/a n/a Shihei Shikanofuda Utsusemi: Ichi, Ni Shadows (Self) 12 37 n/a Shinobi-Tabi Tonko: Ichi, Ni Invisible (Self) 9 34 n/a Sanjaku-Tenugui Monomi: Ichi Sneak (Self) 25 n/a n/a Kabenro Myoshu: Ichi Subtle Blow Plus (Self) 85 n/a n/a Mokujin Migawari: Ichi Makes you immune from severely damaging attacks (Self) 88 n/a n/a Ranka Gekka: Ichi Facilitates enmity gain (Self) 88 n/a n/a Furusumi Yain: Ichi Suppresses Enmity gain (Self) 91 n/a n/a Ryuno Kakka: Ichi Increases own TP gain (Self) 93 n/a n/a