Time Spiral is one of the blocks in the game Magic: The Gathering. It all started with the expansion by the same name that got released in 2006 as the 40th MTG expansion.
Time Spiral has 301 cards that could have been bought through the booster packs of 15 cards, tournament decks of 75 cards, preconstructed themed decks of 60 cards, and a fat pack. All the decks received a Pro Tour Players Card, randomly chosen. However, there are also 121 cards in this expansion that are specially printed for the Time Spiral block, and they're named "time-shifted."
Fun With Fungus is one of the preconstructed theme decks in the Time Spiral. It also contains timeshifted cards: Claws of Gix, Pendelhaven, and Thallid. What's more, there are also rare cards in this deck, like in most other themed decks, and they are Thelon of Havenwood and Verdant Embrace.
While you won't receive the rulebook, you will get a strategy sheet specifically written for this deck. According to the strategy sheet, you should play as many as possible of the 9 Thallid cards as you can. This is because these are fungus-Creatures, and they take 3 rounds to turn into spores, meaning they'll multiply and help you defeat your opponent.
Fun With Fungus Decklist: