Ravenous Trap — ruling 1

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.

Ravenous Trap : règles, fonctionnement et interactions (MTG)

Ravenous Trap is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

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.

How it works : Ravenous Trap

Original English text — Wizards of the Coast / Scryfall

#1August 7, 2020· Wizards of the Coast
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.
No other card is named in this ruling.