Nasir Jones just may be the busiest man in Hip-Hop these days. What is undeniable is that he is experiencing the most prolific period of his 30-year recording career.

On the heels of the third installment of his King's Disease series, rapper 21 Savage questioned Nasty Nas' relevance in contemporary Hip-Hop, crediting the Queensbridge wordsmith's current popularity to a loyal and dedicated fanbase. Nas barely responded to the slight, simply posting the word "LOVE" with a smiling emoji earlier this month.

After facing backlash, 21 clarified his comments on Twitter, writing, “I would never disrespect [N]as or any legend who paved the way for me," 21 tweeted. "Y’all be tryna take stuff and run with it."

In a surprise move, Nas and 21 Savage dropped the Hit-Boy-produced duet "One Mic, One Gun" at midnight on Tuesday (11/29). The horn-heavy, trap-inspired track sees the two rappers trade verses in a show of solidarity.

Both artists spit clever lines on "One Gun. One Mic." Below are 5 of their best lines.

# 1 - "Ain't no back and forth, ain't no left or right, I got King's Disease but I move like a knight..." — 21 Savage

#2 - "I shook up the town, I shook up the city, I shook up the state - I'm with 21 on my second run, this shit come with age..." – Nas

#3 - Did my tour with The Wu', I came back and I set the pace/they just ran in one of my cribs and took what? /I replaced it
Two Caucasians up out of their faces/most of y'all assumed that they was Black/ it's exploitation they ain't know that I see everything/invested in Ring..." –Nas

#4 - I'm on that same trajectory/bullet wounds and jail cells couldn't stop me/ this my destiny/never controversial, I'm mad the fans expected less from me... — 21 Savage

#5 - No back and forth, I did it back then, I do it right now they tellin' me that I'm the G-O-A-T, I been here for a while..." — Nas