There is at least one counter on a permanent you control except
Xavier Sal.
Xavier Sal does not have summoning sickness.
You control at least one additional nontoken Human, Fungus and/or Pirate that has no more than one +1/+1 counter on it.
Steps
Activate
Xavier Sal's first ability by tapping it and removing a +1/+1 counter from the additional nontoken Human, Fungus and/or Pirate if it has one, or any counter from another permanent you control otherwise.
Xavier Sal triggers, causing it and all other creatures you control that share a creature type with it to get +2/+0 and gain undying until end of turn.
Resolve the
Xavier Sal ability, causing you to populate.
If you created a creature token,
Blasting Station triggers when the creature token enters the battlefield, untapping
Blasting Station.
Activate
Blasting Station by tapping it and sacrificing the additional Human, Fungus and/or Pirate.
When the creature dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When the creature enters the battlefield,
Intruder Alarm and
Blasting Station trigger.
Resolve the
Intruder Alarm trigger, untapping all creatures.
Resolve the
Blasting Station trigger, untapping it.
Resolve the
Blasting Station ability from step 5, dealing 1 damage to any target.
Repeat.
Results
Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite damage.
Infinite mana creatures you control can produce.
Infinitely powerful Humans, Fungi and Pirates you control until end of turn.