Titanic Renewal

Whenever you put one or more charge counters on your commander, you may search your library for a land card, put it onto the battlefield tapped, then shuffle.

"Just like how a forest fire replenishes the soil or how
a volcano creates new land, we have seen signs that these creatures will do the same. San Francisco, Las Vegas, wherever the Titans go, life follows, triggered by their radiation."
— Dr. Emma Russell