Hey guys a friend told me about a loop with six samurai and i wanted to post it here for people.
The loop destroys any number of monster on the field
First you need two gateway of the six,Grandmaster and Hand of the six samurai.
Activate 2 gateway and summon Hand and grandmaster.4 counters on the field.Use then hand effect to destroy a monster then remove 4 counters and add grandmaster to your hand.Then again summon it and so on....

This combo is known and has been posted before. Please search before posting combos. thanks.