Kevin Tewart, Sr. Game Designer at UDE replied to a Command Knight question saying
That's strange, because Command Knight's text states
Now consider the text for Guardian Kay'est:
and the text for The Legendary Fisherman:
With either Guardian Kay'est or The Legendary Fisherman (with Umi on Field), the opponent can attack directly, since the only other target available is the player. So it's interesing if a Sr. Game Designer at UDE says that 2 Command Knights equal to a lock.
What's worse is that there isn't an official ruling that clearly specifies whether a lock is generated or not, unlike Marauding Captain's case.
TWO COMMAND KNIGHTS & NO OTHER MONSTERS
Each holds a sign saying "YOU CAN'T ATTACK ME!!!!" This effectively creates
a wall that no monster can pass. (Except monsters that can attack directly
like "Jinzo #7", Toons, etc.)
That's strange, because Command Knight's text states
While at least 1 other monster exists on your side of the field, your opponent cannot select this card as an attack target. Also, as long as this card remains face-up on the field, increase the ATK of all your Warrior-Type monsters by 400 points.
Now consider the text for Guardian Kay'est:
This card can only be Normal Summoned, Flip Summoned, or Special Summoned when there is a "Rod of Silence - Kay'est" on your side of the field. This card is unaffected by any Spell Cards. Also, this card cannot be an attack target of your opponent's monsters.
and the text for The Legendary Fisherman:
As long as "Umi" is face-up on the field, this card is unaffected by any Spell Cards. Monsters on your opponent's side of the field cannot select this card as an attack target.
With either Guardian Kay'est or The Legendary Fisherman (with Umi on Field), the opponent can attack directly, since the only other target available is the player. So it's interesing if a Sr. Game Designer at UDE says that 2 Command Knights equal to a lock.
What's worse is that there isn't an official ruling that clearly specifies whether a lock is generated or not, unlike Marauding Captain's case.