you use the SR or the N card and banish a tons of dark or the SR just gains atk for every monster in grave. and veil of darkness can be dangerous of decking you out.
I played a frost & flame deck that used magical merchant. Only had 1 Moster Reincarnation and 2 Jar of Avarice. Worked really well and was fairly sweet.
use it to duel level 10 LD at gate. winning time is about 2-3 minutes on average. i unlock him faster than I predicted. you can replace those beater with any beater you have.