Globert, the Martian

Vigilance
Whenever a creature you control dies, create a
2/2 colorless Starship artifact creature token
with flying and "Whenever this creature attacks, explore." (Reveal the top card of your library. Put
that card into your hand if it's a land. Otherwise,
put a +1/+1 counter on this creature, then put the
card back or put it into your graveyard.)