Sure, the 5-mana cost and reward make this exceptionally clunky and awkward to cast or benefit from in a multicolored deck, but its still decent in mono-black decks going into the endgame and is worth going over
Better yet, you get to keep the mana it generates until the end of your turn rather than lose it at the end of combat
Mox Tantalite - $19.83 One of the most iconic Magic artists ever, Dan Frazier, is responsible for the art of over half of the cards on this list
I keep thinking this is the same card until I see that big patch of Nyx in the background (even though the figure, pose, and accouterments are different)
Although the tokens enter attacking if The Last Ronin's Technique's sneak cost was paid, those tokens were never declared as attacking creatures
Windfall is so good that you can only play it in Vintage (where it's restricted) and Commander, and is one of the best wheel effects available to blue