Vortex Sound Research

I've got five synths that I usually run into my AI and use reverb effects in Ableton, but I have found a good deal locally for an Eventide Space Reverb, and I would like to pick it up for workflow purposes. I have never used hardware effects pedals. I would like to have the option to have all five instruments connected to the reverb so I could experiment on the fly and see where and which instrument the reverb is working. The Eventide has two inputs/outputs on the back. Am I limited to only being able to connect two at a time? Ive read up some on aux sends with a hardware mixer - is this something I would have to buy? If so, how would that configure into my signal chain connecting everything to my AI?