Sorin of House Markov

Lifelink

Extort <i>(Whenever you cast a spell, you may pay w/b)}. If you do, each opponent loses 1 life and you gain that much life.)</i>

At the beginning of your postcombat main phase, if you gained 3 or more life this turn, exile Sorin of House Markov, then return him to the battlefield transformed under his owner's control.