mtg fling cards Magic The Gathering Card Fling deals damage equal to the sacrificed creatures power to any target. Fling | Dark Ascension |

The ones which provide colored mana, corresponding with basic land types, can all sacrifice to draw a card

Check the Hologram Rare and mythic rare cards printed in and after Core Set 2015 (July 2014) have an oval hologram sticker at the bottom center of the card, under the text box

The other Sphere taps for colorless, can tap on the turn you drop it, and then taps with 3 to make a 1/1 colorless artifact that cannot block with toxic 1

Its also worth noting that, as has been the case with more recent Commander products, the mana bases for these decks has improved greatly when compared to those of decks a couple of years ago

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Its a perfect fit for big stompy decks full of giant creatures you dont mind casting for free, and its trivially easy to transform it back once it turns into Temple of Cultivation