If an opponent uses Gust to remove a unit in response to Gutter Palace's win condition trigger, does Gutter Palace still win the game?

Ruling: Yes, Gutter Palace still wins the game. The win condition is checked when the trigger is placed on the chain, not when it resolves. Once the trigger has been placed on the chain, removing a unit in response does not prevent the win.

Sequence:

• At the start of your Beginning Phase, the game checks if you have exactly 4 cards in hand and exactly 4 units at battlefields
• If true, the trigger is placed on the chain and finalizes
• Opponents may play reaction cards like Gust in the resulting closed state
• When the trigger resolves, it wins the game without rechecking the condition

Nuances:

• The conditional "if you have exactly 4 cards in hand and exactly 4 units at battlefields" appears directly after the trigger condition, making it part of the trigger requirement rather than part of the effect
• Conditions are only checked at the moment the trigger would be placed on the chain, not upon resolution