If you're instructed to investigate multiple times, those actions are sequential, meaning you'll create that many Clue tokens one at a time
Weve seen this idea before, with Hidetsugu, Devouring Chaos in Kamigawa: Neon Dynasty and Cavern of Souls in The Lost Caverns of Ixalan
Roiling VortexRoiling Vortex hits each player for one damage on their upkeep
The Fox Offering Syndrome is named after Patron of the Kitsune, which is a great card for multiplayer, but has almost never gotten played, because mentally, we assign it to Fox decks, given that ability
Walking Ballista also avoids all removal since you can just shoot your opponent in the face in response to them trying to kill it
After all, Magic is all about having fun, and you shouldnt stress out too much about whether your deck is legal