Super Spiral Engine

Cumulative Upkeep—Remove a Spiral Counter
from a creature you control. (At the beginning of
your upkeep, put an age counter on this permanent,
then sacrifice it unless you pay its upkeep cost
for each age counter on it.)
Once per turn, you may cast a creature card from
you hand, who's mana value is equal to or less
than the number of age counters on Super Spiral Engine, without paying its mana cost.