Player 1 starts with the First turn Advantage. Player 1 and player 2 select their spells while the pointer points to player 1. Spells are cast for Player 1, and the pointer rotates to player 2, and that spell is cast. (Here player 1 and player 2 are basically blind).
The pointer stays on Player 2, and both players select their spells. Player 2's spell is executed and the pointer rotates to Player 1 and that spell is executed. (Here player 1 is blind to player 2).
The pointer stays on Player 1, and both players select their spells. Player 1's spell is executed and the pointer rotates to Player 2 and that spell is executed. (Here player 2 is blind to player 1).
This way, we have one blind player that alternates throughout the match.