Spontanzauber — Falle
Falls drei oder mehr Kreaturen angreifen, kannst du

bezahlen, anstatt die Manakosten der Müdigkeits-Falle zu bezahlen.
Angreifende Kreaturen erhalten -3/-0 bis zum Ende des Zuges.
Effects that increase or reduce the cost to cast a Trap will apply to whichever cost you chose to pay.
Casting a Trap by paying its alternative cost doesn't change its mana cost or mana value. The only difference is the cost you actually pay.
You may ignore a Trap's alternative cost condition and simply cast it for its normal mana cost. This is true even if its alternative cost condition has been met.