Vishnu can be found behind the door
opposite to where you fought Shiva.
Vishnu is a lot more difficult than Shiva, due to one attack, Chaterbhuja. This attack is almighty, and can hit all three of your members several times, and can also score criticals too. But that's only half of it. Like Shiva, Vishnu has changing affinities, except this time, they're down to what attack you used to hit him previously, so, for example:
Ice = attacks with fire. Elec, force and earth work
Fire = attacks with ice. Elec, force and earth work
Force = attack with elec. Ice, fire and earth work
Elec = attack with earth. Ice, fire and force work
Earth = attack with force. Ice, fire and elec work
Almighty =...
Outros vídeos de Shin Megami Tensei: Digital Devil Saga (tutorial)