(6/6/2025) Although the ninjutsu ability has the creature enter the battlefield attacking, it was never declared as an attacking creature (for the purposes of abilities that trigger whenever a creature attacks, for example)
Decklist: Planeswalker (1)
Thats because, also like Clue, you are able to ask other players if they have certain suspects, weapons, or rooms in their pile, but here making those guesses is restricted by Magic mechanics: you get the opportunity to do so only when you either deal combat damage to another player, or exile six mana value worth of cards from your graveyard at the end of your turn
If you want to make sure you get to beat face unimpeded, look at mono-white, mono-blue, Azorius, or Selesnya