incomprehensible

Toxic_Z

I ran the flag through my handy-dandy one line cipher and got MUIiJmFxRyAnSUQmESoON0QbEy5Hf1EqB0NOFXNLTXleIzMSaRRYID8lcX4WA3RP. I hope you're ready to wrangle this 20-foot Burmese Python...

print(import('base64').b64encode(b''.join([([l.append(bytes([v[0]for v in sorted(zip([p[j]^l[-1][(i+j+1+(16//2))%16]for j in range(16)],(lambda x:[([l.append((lambda n,u:(lambda f,a:f(f,a))((lambda r,i,u:i if i not in u else r(r,(i+1)%16,u+[i])),n%16,u))(c,l))for c in x[::-1]],l)for l in [[]]][0][1])(l[-1])),key=lambda x:x[1])]))for i,p in enumerate([f[i16:(i+1)16]for i,f in enumerate((lambda x,y:[y]x)([f if i else len(f)//16 for i,f in enumerate([b''.join([f if i else bytes(list(range(f+1))[1::][::-1])for i,f in enumerate([f if i else 16-(len(f)%16)for i,f in enumerate([bytes(input(),'utf-8')]2)])])]2)]))])],l) for l in[[b'CoOL N0nCE duD3!']]][0][1][1:])))