Hehena Island Shaman

Volatile - At the beginning of each upkeep, flip a coin. If you win the flip, you gain 1 life. If you lose the flip, target opponent loses 1 life.
"The Shamans of Hehena Island are raving madmen, preforming dark rituals to summon their evil overlord. Avoid them at all costs!" -Maui, the Wayfinder