You control a creature token that has base power or toughness that is greater than Sharp-Eyed Rookie's power or toughness.
You control a permanent that has a counter on it.
Steps
Activate Xavier Sal's first ability by tapping it and removing a counter from a permanent you control, creating a copy of another creature token with base power or toughness that is greater than Sharp-Eyed Rookie's power or toughness.
When the Wolf token enters the battlefield, Intruder Alarm and Sharp-Eyed Rookie trigger.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Sharp-Eyed Rookie trigger, putting a +1/+1 counter on it and creating a Clue artifact token.