Diglett

Sacrifice this creature if you do not control a Forest, Plains, Mountain or Desert. It can't attack unless defending player controls those lands.
Flash, protection from sources that cost {e}
Desertwalk, Plainswalk (This creature can't be blocked as long as defending player controls a Desert or Plains.)
As long as Diglett remains tapped, it has shroud.
{t}, Exert Diglett: Diglett deals damage equal to its power to target creature without flying.