Silver Dice Block
From the Super Mario Wiki
A Silver Dice Block is a Bonus Dice Block appearing in Mario Party: Island Tour. It is obtained when the player finishes a minigame for Bonus Dice Blocks in second place in Perilous Palace Path, or third in Bowser's Peculiar Peak. When they use it, the player is able to roll two Dice Blocks (one is normal, and one is the Silver Dice Block) to go from two to nine spaces.
The Dice Block reappears in Mario Party: Star Rush, but only when amiibo are used. If an amiibo has save data from Mario Party 10 on it and the game detects a Silver Token before starting Toad Scramble, Balloon Bash or Mario Shuffle, then a Silver Dice Block will be added as an item at the start of the game. Unlike other Dice Blocks, the Silver Dice Block can roll the numbers 3, 4, 5, 6, 7 and 8.