Just for fun

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.) As long as Deadeye Navigator is paired with another creature, each of those creatures has ": Exile this creature, then return it to the battlefield under your control."

When this creature enters, you gain 5 life. When this creature leaves the battlefield, create a 3/3 green Beast creature token.

Whenever you gain life, target opponent loses that much life.