Shroudscape Explorer

Vigilance, reach
Ambition 3 {3}{g}{g} ({3}{g}{g}, Exile the top three
cards of your library: If Shroudscape Explorer isn't
ambitious, put three +1/+1 counters on it and it
becomes ambitious.)
As long as Shroudscape Explorer is ambitious,
you may play creature and land cards exiled
with Shroudscape Explorer.