What happens when you conquer Aspirant's Climb with Green Father and brush the battlefield when both players are at 8 points?

To answer your question, we must look at how Aspirant's Climb functions as a passive effect and how the game handles victory conditions and battlefield replacements.

The Ruling

The game does not end immediately. Because Aspirant's Climb increases the victory score requirement, the players are not currently at the victory condition.

1. Aspirant's Climb Effect: According to RiftJudge FAQ #7987, Aspirant's Climb has a passive effect that is active simply by being in play. In a standard 1v1 game, it increases the victory points needed from 8 to 9.
2. Current State: If both players were at 8 points while Aspirant's Climb was in play, they were already in the middle of a game where the victory threshold is 9. Conquering the battlefield (and triggering Green Father to replace it with a Brush token) removes Aspirant's Climb from play.
3. Removal of Passive Effect: Once Aspirant's Climb is replaced by the Brush token, its passive effect ("Increase the points needed to win the game by 1") ceases to apply.
4. Victory Check: The victory condition immediately reverts to the standard 8 points. Because the players currently have 8 points, they now meet the updated victory threshold.

According to Rule 467, a player wins if they have points greater than or equal to the victory score AND have more points than any opponent. Since both players are at 8 points, they are currently tied. The game continues because neither player has more points than the other, despite both meeting the new victory requirement.

Summary of the Sequence

• Conquer: You conquer the battlefield containing Aspirant's Climb.
• Trigger: Green Father triggers, allowing you to replace the battlefield with a Brush token.
• Passive Effect Ceases: Aspirant's Climb leaves the board; the victory threshold drops from 9 back to 8.
• State Check: Both players are at 8 points. Because neither player has more points than their opponent, the game does not end in a win for either player. The game proceeds until one player can gain a point to break the tie.

Note: This interpretation is based on the interaction between passive battlefield effects and victory conditions. No official FAQ exists for this specific scenario involving a mid-turn removal of a victory-threshold-altering card.