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Copying a threatening creature to attack, getting a second copy of a powerful value engine for a turn, doubling Dockside Extortionistthese are all very good use cases for this card

In particular, Innistrad introduced double-faced transforming cards to reflect its horror inspiration

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Its not surprising that a lot of the Zendikar Rising lands are here, either

Most angels are mono-white and have more combat-related abilities like vigilance, lifelink, and first strike

There's a billion variations of this combo, but all of them involve a creature that produces at least one additional creature like Hunted Witness or Sengir Autocrat, sacrificing the creature to a repeatable (usually free) sacrifice outlet like Ashnod's Altar, getting the creature back into play with stuff like Nim Deathmantle or Decaying Soil, and finally a card that turns these infinite death triggers into a win like Blood Artist