Does Grand Stratagem give a snapshot buff at resolution, or does it passively buff units that enter the board after it resolves?

Ruling: Grand Stratagem gives its buff only to units present on the board when it resolves. Units that enter the board after resolution do not receive the buff.

Sequence:

• Grand Stratagem resolves
• It buffs all units currently on the board at that moment
• Any units entering the board afterward are not affected