"between old friends" easy way

[Sam W 2009]

go to unlocked acts choose act 9 on EASY difficulty with cross play through and just before the cutscene where you fight the immortal press start and go to CHANGE DIFFICULTY LEVEL. Put it on the hardest difficulty and then kill the immortal and a nice little 25G

[neeker75]

If you do the checkpoint trick, you don't even need to kill him on hard to get it.