12 cards where the text includes “exchange” and the text includes “life” and the text includes “total”

Axis of Mortality (Ixalan #3)
Everythingamajig (Unstable #147f)
Evra, Halcyon Witness (Dominaria #16)
Get a Life (Unglued #4)
Magus of the Mirror (Conspiracy #117)
Mirror Mirror (Unglued #77)
Mirror Universe (Masters Edition #159)
Profane Transfusion (Commander Legends #145)
Psychic Transfer (Starter 1999 #46)
Soul Conduit (New Phyrexia #158)
Tree of Perdition (Eldritch Moon #109)
Tree of Redemption (Masters 25 #191)

The message was clear to Sorin—time to search for something else.