Originally posted by: photonic
How in the FUCK do I know? You're so articulate. I know because I read what he said and hypothesized from the context. Sandaime recognizes Edo Tensei. When Orochimaru reveals his other technique, Sandaime is surprised(Episode 71). Therefore, it stands to reason, that the technique Orochimaru developed by himself and plans to use for Tsunade is the second one.
It kinda obvious that the coffin jutsu is what he's talking bout, it is used to raise the dead. As long as he doesn't perform the second part of the jutsu they want be mindless zombies. The other Jutsu is used to switch Oro soul into the body of a younger person.