Snow-Covered Island

Evanescent Intellect

Enchant creature
Enchanted creature has "{1}{U}, {T}: Target player mills three cards."

Fortress Crab

Winter's Rest

Enchant creature
When Winter's Rest enters, tap enchanted creature.
As long as you control another snow permanent, enchanted creature doesn't untap during its controller's untap step.

Turn Aside

Counter target spell that targets a permanent you control.

Purple-Crystal Crab

When Purple-Crystal Crab dies, draw a card.

Ponder

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Mana Leak

Counter target spell unless its controller pays {3}.

Vapor Snag

Return target creature to its owner's hand. Its controller loses 1 life.

Counterspell

Iceberg Cancrix

Whenever another snow permanent you control enters, you may have target player mill two cards.