AdmiralMemo wrote:The way I'm reading Maze's End is that after you activate the ability and get your gate out, you win right then if you meet the conditions. "Win the game" seems to be part of the resolution of the ability.
Scapeshift puts end down tapped. Tapping is part of the cost of the win-condition, so unless you've got Maze's End out already, you've got at least a turn to wait and hope no-one plays Armageddon.