Reckoning Dice is a sub-boss found on the 211th floor of Tartarus. It impedes the player's progress and must be beaten to proceed. The Reckoning Dice is only vulnerable to physical attacks, but can cast Tetrakarn to cover this vulnerability temporarily. Bring Aigis for this fight, especially if she has her Pallas Athena Persona - when the Dice casts Tetrakarn and Aigis has her turn next, enable Rush mode to ensure she cancels it without harm, due to her resistance to Pierce.