Kyemine, Celestial Guide

Traverse —Whenever Kyemine, Celestial Guide enters or leaves the battlefield, reveal the top three cards of your library. You may put a land card revealed this way onto the battlefield tapped. Put the rest into your graveyard.
Lifelink
Whenever a nonbasic land enters the battlefield, each opponent loses 2 life. You gain life equal to the life lost this way.