Commander Masters

Kozilek, the Great Distortion

When you cast this spell, if you have fewer than seven cards in hand, draw cards equal to the difference.
Menace
Discard a card with mana value X: Counter target spell with mana value X.

Explorer Anthology 2

Secret Lair Drop

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Oath of the Gatewatch

When you cast Kozilek, the Great Distortion, if you have fewer than seven cards in hand, draw cards equal to the difference.
Menace
Discard a card with converted mana cost X: Counter target spell with converted mana cost X.