Kessig Forgemaster // Flameheart Werewolf — ruling 1

Kessig Forgemaster's first ability triggers once for each creature blocking or blocked by it. The ability resolves and deals damage to that creature before combat damage is dealt. If that damage destroys a creature blocking Kessig Forgemaster, Kessig Forgemaster doesn't become unblocked.

Kessig Forgemaster // Flameheart Werewolf — ruling 2

The abilities that transform a Werewolf back and forth look at the entire previous turn, even if the Werewolf with that ability wasn't on the battlefield for some or all of that turn.

Kessig Forgemaster // Flameheart Werewolf — ruling 3

Flameheart Werewolf's first ability triggers once for each creature blocking or blocked by it. The ability resolves and deals damage to that creature before combat damage is dealt. If that damage destroys a creature blocking Flameheart Werewolf, Flameheart Werewolf doesn't become unblocked.

Kessig Forgemaster // Flameheart Werewolf — ruling 4

To trigger the Werewolf's back face's transform ability, a single player must have cast two or more spells during the previous turn. If multiple players each cast just one spell during the previous turn, the ability won't trigger.

Kessig Forgemaster // Flameheart Werewolf : règles, fonctionnement et interactions (MTG)

Kessig Forgemaster // Flameheart Werewolf 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

Whenever this creature blocks or becomes blocked by a creature, this creature deals 1 damage to that creature. At the beginning of each upkeep, if no spells were cast last turn, transform this creature. Whenever this creature blocks or becomes blocked by a creature, this creature deals 2 damage to that creature. At the beginning of each upkeep, if a player cast two or more spells last turn, transform this creature.

How it works : Kessig Forgemaster // Flameheart Werewolf

Original English text — Wizards of the Coast / Scryfall

#1April 8, 2016· Wizards of the Coast
Kessig Forgemaster's first ability triggers once for each creature blocking or blocked by it. The ability resolves and deals damage to that creature before combat damage is dealt. If that damage destroys a creature blocking Kessig Forgemaster, Kessig Forgemaster doesn't become unblocked.
No other card is named in this ruling.
#2April 8, 2016· Wizards of the Coast
The abilities that transform a Werewolf back and forth look at the entire previous turn, even if the Werewolf with that ability wasn't on the battlefield for some or all of that turn.
No other card is named in this ruling.
#3April 8, 2016· Wizards of the Coast
Flameheart Werewolf's first ability triggers once for each creature blocking or blocked by it. The ability resolves and deals damage to that creature before combat damage is dealt. If that damage destroys a creature blocking Flameheart Werewolf, Flameheart Werewolf doesn't become unblocked.
No other card is named in this ruling.
#4April 8, 2016· Wizards of the Coast
To trigger the Werewolf's back face's transform ability, a single player must have cast two or more spells during the previous turn. If multiple players each cast just one spell during the previous turn, the ability won't trigger.
No other card is named in this ruling.