That cyber stein deck is a brick-city. I mean, just look at the card he use. Why 3 Magical Mallet instead of 3 Into the Void? And he only has 3 protection which are Kuriboh. No one would ever made it to legend unless he use Mod APK
bcoz u only need at least 2-6 turn to win, i use kuriboh instead of ebola bcoz it didn't change the enemy's BP, and my BEWD will give much battle dmg from that ATK position.
and why use mallet instead void? do u know the side effect of void? can only be used at least 3 card in hand & u discard all of them at end phase, that's a huge brick ma bro, cyber stein deck tends on patience.
I used Life Cost ) to reach KOG 2 seasons ago and can testify its power. Sure it bricks from time to time but it's fun to use. And also, I tried Void and it's terrible; I use the Solemn Scolding variant