1 Warrior-Type Tuner + 1 or more non-Tuner "Six Samurai" monsters Once per turn, during either player's turn, when your opponent activates a Spell/Trap Card: You can negate the activation, and if you do, destroy it. If this card would be destroyed, you can destroy another face-up "Six Samurai" monster you control instead.
Self Protection effect requires you to destroy another Six Samurai monster.
Semi-specific Synchro materials.
Having both Legendary Six Samurai - Shi En and Great Shogun Shien on the field at the same time does not mean you lock your opponent out of activating Spell/Trap cards. Spell/Trap cards negated by Shi En do not count towards the one activation Great Shogun Shien allows.
Normal Summon Legendary Six Samurai - Kageki and use his effect to Special Summon Kagemusha of the Six Samurai or Secret Six Samurai - Genba and use them to make Legendary Six Samurai - Shi En.
You can Normal Summon Secret Six Samurai - Fuma and then Special Summon Legendary Six Samurai - Kizan and use both monsters to Synchro Summon Shi En.
You can only revive Shi En if he was Synchro Summoned properly first. Use Cunning of the Six Samurai to send a Six Samurai monster on your field and revive Shi En.
You can revive Shi En with Return of the Six Samurai. And instead of destroying Shi En during the End Phase, you can use his protection effect to destroy another Six Samurai monster you control instead.
Negates the activation of your opponent's Spell Cards / Destroys your opponent's Spell Cards / Negates the activation of your opponent's Trap Cards / Destroys your opponent's Trap Cards / Redirects destruction
The best way to avoid OTK from Shi En is to play any kuriboh / sphere version of there little guy. (Now I see why they nerfed Last Gamble lol, good move, otherwise Samurais wouldn't have been good when released)
If anything this dude slayed another archetype kinda too early lolz