Summoner's Portal

{1}{g/u}, Reveal Summoner's Portal from your
hand: Create a token that's a copy of
Summoner's Portal.
{g/u}: Put a charge counters on Summoner's Portal.
Reveal a card named Summoner's Portal from
your hand, remove X charge counters, {t}: You
may put a creature with mana value X or less
from your hand onto the battlefield.