Asura

Atomic Hellscape— When Asura enters, it deals
X damage to each player, where X is
the number of nonbasic lands that player
controls.

Unshaken Will— You may play an
additional land on each of your turns. At the
beginning of each upkeep, if you did not lose
life last turn, you may search your library for
a basic land card, reveal it, put it into your
hand, and shuffle.