Darth Vader,Imperial Commander

When Darth Vader, Imperial Commander enters the battlefield, choose a player, whenever you lose life, the chosen player also loses that much life.
{3}{w}: Create a 1/1 white stormtrooper creature token.
{1}{b}, sacrifice a creature: Target opponent loses 2 life.
{2}{r}: Darth Vader, Imperial Commander deals 2 damage to any target.