Dice Dungeon - BLCR-EN005 - Ultra Rare

When this card is activated: You can add 1 "Dimension Dice" from your Deck to your hand. At the start of the Battle Phase: You can make each player roll a six-sided die and apply their result to all monsters they control until the end of this turn.
? 1: They lose 1000 ATK.
? 2: They gain 1000 ATK.
? 3: They lose 500 ATK.
? 4: They gain 500 ATK.
? 5: Their current ATK become halved.
? 6: Their current ATK become doubled.