Gem Knights Deck

(You Should Start Second)

After special summoning gem knight phantom quartz , add a fusion spell to your hand if you don't already have one then special summon a fusion monster (except master diamond) with it using materials from your hand or monsters from the field except gem knight phantom quartz , then use phantom quartz's effect to summon lady brilliant diamond , then use brilliant diamond's effect to tribute phantom quartz to special summon master diamond from the extra deck .

Since there are 3 gem knight phantom quartz in the extra deck , if you special summon another knight phantom and use its effect again during another turn , you can send a gem knight phantom from the graveyard to the extra deck so you don't run out of phantom quartz.