Ill-Natured Spiritual Invasion

{{Infobox album

| name = Ill-Natured Spiritual Invasion

| type = studio

| artist = Old Man's Child

| cover = Old Man's Child - Ill-Natured Spiritual Invasion.jpg

| alt =

| released = 23 June 1998

| recorded = March – April 1998

| venue =

| studio =

| genre = Melodic black metal

| length = 35:19

| label = Century Media Records

| producer = Galder

| prev_title = The Pagan Prosperity

| prev_year = 1997

| next_title = Revelation 666 – The Curse of Damnation

| next_year = 1999

}}

{{Album ratings

| rev1 = Allmusic

| rev1Score = {{Rating|2.5|5}} {{AllMusic|class=album|id=r365236|first=Jason|last=Ankeny}}

| rev2 =

| rev2Score =

}}

Ill-Natured Spiritual Invasion is the third studio album by Norwegian black metal band Old Man's Child. Most of the vocals were improvised by Galder while in the studio.