Ravenous Trap
Instant — Trap
If an opponent had three or more cards put into their graveyard from anywhere this turn, you may pay 
rather than pay this spell's mana cost.
Exile target player's graveyard.
Cyril Van Der Haegen
Double Masters (2XM)
• #103Rulings
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as Ravenous Trap's alternative cost), add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
(wotc • 2020-08-07)
Rulings
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as Ravenous Trap's alternative cost), add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
(wotc • 2020-08-07)