“Window”

Kicker {u}
Blocking creatures get -2/-0, gain last strike, and
lose all other abilities until end of turn.
If this spell was kicked, attacking creatures gain trample until end of turn.
During the raids on Hamburg in July 1943, RAF
bombers dropped aluminum foil strips. The German
radars could not tell the difference between foil and
bomber. With their radars blinded, the German
fighters and AA guns let the bombers through.