Super Note Block
From the Super Mario Wiki
Super Note Blocks (formerly known as Magic Note Blocks or Red Jump Blocks) are objects derivative of Note Blocks that appear in Super Mario Bros. 3 and Super Mario 3D Land. When a player presses the jump button just after landing on one, they will ascend into a Coin Heaven.
In Super Mario 3D Land, where they are twice as long, have a white note instead of black, and flash a rainbow of colors, the following area usually has a Super Star used to run through a group of enemies, or a platforming section that requires use of the 3DS's stereoscopic 3D, in order to receive a Star Medal at the end.
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