Post any KKG, jutsu, or clan ability that disturbs you. For me ive never been able to get over the fact the Aburame are totally cool with hosting a whole colony of beetles in their bodies.
1) Aburame hive bodies
2) Deidara's mouths
3) Orochimaru's white snake essence/mutation
4) Kakuzu's linen body and taking hearts
5) Hidan's voodooesque Jashin ritual
6) Hidan's immortality
7) Sasori turning real people and himself into puppets
8) Pein using corpses as avatars
9) Konan's 6 hundred billion explosive tags
10) Amaterasu
11) Tsukuyomi
12) Samehada being alive
13) Danzou infusing sharingans into his arm
14) Five antagonists stealing Hashirama's cells and infusing them into themselves and people.
15) Edo Tensei
16) Izanagi
17) Kaguya's nine tomoe sharingan
18) Limbo
19) Deva Path
20) Asura Path
21) Naraka Path
22) Curse Mark 1
23) Curse Mark 2
24) Orochimaru's transmigration ritual
25) The inside of Iwagama
26) Obito berserked with Mokuton
27) Tengu Susano'o
28) Full Kyuubi cloak Naruto
29) The Juubi revived
30) Hanzo's poison-filled body
31) Spored white Zetsu
32) Sand Coffin
33) Gaara half transformed into shukaku
34) Kimimaro pulling his bones from his body and using them as weapons
35) Sakon and Ukon fusing to Kiba
36) Base sharingan genjutsu from Kakashi
37) Base Sharingan genjutsu from Itachi
38) Ibiki's Iron Maiden
39) Orochimaur's giant serpent form
40) Kabuto fused with sound 5