Hibernation's End
{4}{G}
Enchantment
Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on ~this~, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Whenever you pay ~this~'s cumulative upkeep, you may search your library for a creature card with mana value equal to the number of age counters on ~this~, put it onto the battlefield, then shuffle.