[It’s WIP. I ain’t gotta explain shit.]
About
“It’s Magic. I Ain’t Gotta Explain Shit.” is an image macro, used as an reaction image to explain various improbable or illogical things or situations, describing it as “magic”. It is also used as a snowclone “It’s X. I Ain’t Gotta Explain Shit”.
Origin
The picture, which was the basis for the original image macro, depicts the character Dungeon Master from the Dungeons & Dragons animated TV series, which aired in 1983-1985. It is unknown when the image macro was originally made, but the earliest known archived example of it can be found in a thread on 4chan’s /a/ board, dating back to December 21st, 2008[1].

Spread
On July 29th, 2012, a Reddit user 4alex6 posted a derivative image macro to r/atheism subreddit, featuring the former Pope of the Catholic Church, Benedict XIV. In over 3 years, the post got over 1244 upvotes[2].

Various Examples
Search Interest
[unavailable]
External References
[1]archive.moe – /a/ post No.17305409