Winter's Chill — ruling 1

If a turn has multiple combat phases, this spell can be cast during any of them as long as it’s before the beginning of that phase’s Declare Blockers Step.

Winter's Chill — ruling 2

The payments are made when the spell resolves. The three options are: pay {2} to let creature act as normal, pay {1} to have creature neither deal or receive damage, or pay nothing and the creature does deal and receive damage but it will be destroyed at end of combat.

Winter's Chill : règles, fonctionnement et interactions (MTG)

Winter's Chill 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

Cast this spell only during combat before blockers are declared. X can't be greater than the number of snow lands you control. Choose X target attacking creatures. For each of those creatures, its controller may pay or . If that player doesn't, destroy that creature at end of combat. If that player pays only , prevent all combat damage that would be dealt to and dealt by that creature this combat.

How it works : Winter's Chill

Original English text — Wizards of the Coast / Scryfall

#1September 20, 2013· Wizards of the Coast
If a turn has multiple combat phases, this spell can be cast during any of them as long as it’s before the beginning of that phase’s Declare Blockers Step.
No other card is named in this ruling.
#2October 4, 2004· Wizards of the Coast
The payments are made when the spell resolves. The three options are: pay to let creature act as normal, pay to have creature neither deal or receive damage, or pay nothing and the creature does deal and receive damage but it will be destroyed at end of combat.
No other card is named in this ruling.