There is at least one counter on a permanent you control.
You control at least one creature token.
Steps
Activate Xavier Sal's first ability by tapping it and removing a counter from a permanent you control, creating a copy of any creature token you control.
When the creature token enters the battlefield, Intruder Alarm and Good-Fortune Unicorn trigger.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Good-Fortune Unicorn trigger, putting a +1/+1 counter on the creature token.