Did you know your FX times add new strategy and gameplay elements every time you play?
FX tiles get used when the play-action die is rolled to the FX shown. These also have chase levels of rarity - FX and Ultra FX tiles - Ultra FX show up less often, and as you'd expect have special powers. FX tiles also come in two varieties - FX Tiles and Premium FX tiles. These are game play enhancement tiles, and not NBA player tiles.
Premium FX tiles are made of the same acrylic material as Flexagons. Premium FX tiles are in First Mint Starters and are also available for upgrades as purchased online at FLEXNBA.com.