Ben Tennyson

When Ben Tennyson enters the battlefield, search
your library for an alien card. place the alien card
on this card. if it dies or destroyed remove the alien
card. At the begining of each of your thens this card
is reveled, {t}{x}. search your library for an {x} cost
alien card. place the alien card on this card. Shuffle
your library.
Cant be destroyed as long as it is covered.