Lethargy Trap
Mana cost
Mana value4TypeInstant — Trap
Color identity
Blue
RarityCommon
SetZendikar (ZEN)
ArtistAnthony Francisco
Price€0.12 · foil €0.22 · $0.08
Lethargy Trap 

Instant — Trap
If three or more creatures are attacking, you may pay
rather than pay this spell's mana cost.
Attacking creatures get -3/-0 until end of turn.
Attacking creatures get -3/-0 until end of turn.
Suddenly, Zurdi didn't care about treasure, glory, food . . . or the drakes circling above.
Legality
CommanderLegalStandardNot legalPioneerNot legalModernLegalLegacyLegalVintageLegalPauperLegalBrawlNot legalOathbreakerLegalHistoricNot legalTimelessNot legalPenny DreadfulLegal
Rulings
2009-10-01
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.
2009-10-01
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.
2009-10-01
Effects that increase or reduce the cost to cast a Trap will apply to whichever cost you chose to pay.