Tengu format ruling
Sasuke Samurai #4

Card effect (current official text)If this card battles a monster, toss a coin and call heads or tails before damage calculation. If you call it right, destroy the opponent's monster with this effect.
Rulings
- You activate the effect of Sasuke Samurai #4 at the beginning of the Damage Step, before the monster is flipped face-up. A monster destroyed by the effect of Sasuke Samurai #4 is not destroyed as a result of battle. There is no damage calculation. It is not flipped face-up. Any Flip Effects it has are not activated.
- If Sasuke Samurai #4 attacks a face-up Attack Position Reflect Bounder, the effect of Sasuke Samurai #4 is resolved before the effect of Reflect Bounder.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.