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You can't interrupt an instant ability
You can't interrupt an instant ability if it is on a character and it doesn't cause the removal of the opponent's character.
I have no idea what y'all are saying, but as to the original question:Achan’s SinType: Evil Enh. • Brigade: Pale Green • Ability: 1 / 1 • Class: None • Special Ability: Interrupt the battle and remove all cards in battle from the game. • Identifiers: None • Verse: Joshua 7:25 • Availability: Patriarchs booster packs (Rare)ItB interrupts the last enhancement played (Obedience of Noah), which puts Goliath back into battle, and removes blue hero and Goliath from the game. Achan's Sin must complete before the interrupt ends, so there is no "check" for brigade color match. The battle ends as a failed RA. The 1/1 pale green guy goes back from whence he came.