Witchstalker Frenzy — ruling 1

Witchstalker Frenzy's first ability doesn't change its mana cost or mana value, only the total cost you pay. Specifically, the mana value of Witchstalker Frenzy is always 4.

Witchstalker Frenzy — ruling 2

Witchstalker Frenzy's first ability can't reduce its cost to less than {R}.

Witchstalker Frenzy : règles, fonctionnement et interactions (MTG)

Witchstalker Frenzy 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

This spell costs less to cast for each creature that attacked this turn. Witchstalker Frenzy deals 5 damage to target creature.

How it works : Witchstalker Frenzy

Original English text — Wizards of the Coast / Scryfall

#1September 1, 2023· Wizards of the Coast
Witchstalker Frenzy's first ability doesn't change its mana cost or mana value, only the total cost you pay. Specifically, the mana value of Witchstalker Frenzy is always 4.
No other card is named in this ruling.
#2September 1, 2023· Wizards of the Coast
Witchstalker Frenzy's first ability can't reduce its cost to less than .
No other card is named in this ruling.