If your opponent used Sandshrew's "Sand Attack" on the previous turn, and you attack with Passimian's "Intentional Grounding" which requires you to discard a Tool from your hand or the attack does nothing, do you discard the Tool before you flip for the Sand Attack effect or after?
Flip for the Sand Attack effect first; if it's tails your attack ends immediately, or if it's heads you proceed with your attack as normal.
Intentional GroundingSand Attack