Slobad, Iron Goblin is the closest thing to a Fling for mana
Yes, the cards you draw will always be lands and yes, no matter how well you shuffle your deck after, you draw another land way too often because variance hates you
This adds an element of competition to card trading, and can be a good way of amassing additional cards that you can use for further trading
Decadent Dragon In a similar vein, but better - providing card advantage and an effective creature - is Decadent Dragon
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Wizards of the Coast and Square Enix have collaborated to make a massive, three-pronged love letter to the series and a great way to steep newcomers in its tropes and characters