Cover of Winter

Snow Enchantment, 2W (3)
Cumulative upkeep {S} ({S} can be paid with one mana from a snow permanent.)
If a creature would deal combat damage to you and/or one or more creatures you control, prevent X of that damage, where X is the number of age counters on Cover of Winter.
{S}: Put an age counter on Cover of Winter.¹
Illus. Wayne Reynolds

Crystal Keep Rulings Summaries

• It prevents X damage from each creature, each time that creature deals combat damage. If a creature has Double Strike, then each of its two combat damage steps will have X prevented. [Coldsnap FAQ 2006/06/14]
• If a creature's damage is split among more than one recipient, you decide which damage is prevented. [Coldsnap FAQ 2006/06/14]
• Note - Also see Cumulative Upkeep, Rule 502.13.
• Note - Also see Snow, Rule G19.13.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Coldsnap (Rare)