Nauro, the Equalizer

When Nauro enters the battlefield, choose a player other than you. If that player's life total is above 20, that player loses life until his or her life total is 20, or until he or she has lost life equal to your life total minus three, whichever comes first. You lose life equal to the life lost this way. If that player's life total is under 20, that player gains life until his or her life total is 20, or until he or she has gained life equal to your life total minus three, whichever comes first. You lose