Help with Dice Dungeon Field Card

[Bad-People]

I writing a story about a duel tournament in which each chapter consists of the next duel in the rankings. I’m planning on making the second opponent have a gamble based deck(Dice & Coin Flip cards). I want him to use the Dice Dungeon field card from the TV show but its effects were  never totally outlined. 

 

When your monster battles you roll a six-sided die and the monster you’re battling gains and effect based on the number rolled. 1, 2, 5, & 6 are all known. (monster loses 1000 ATK, gains 1000 ATK, ATK halved, & ATK doubled respectively.) 

 

What I want is recommendations for effects for numbers 3 & 4 which are never revealed.