There is an urban legend about a secret dungeon in LINK VRAINS. It's packed full with dangerous traps. And what waits at the other end is...
And when I Link Summoned 
Secure Gardna, I was certain.
Sicher war ich mir erst,
als ich Secure Gardna beschwor.
Y cuando invoqué
a Secure Gardna, lo confirmé.
E quando eu realizei a invocação especial
do Secure Gardna, eu tive certeza.