Resources

Magic: The Gathering Oracle Changes

Coldsnap to Time Spiral (Single Change View)

Changes involving "you may tap or untap"

Old card (Coldsnap) New card (Time Spiral)

Mind Over Matter

{2}{U}{U}{U}{U}

Enchantment

Discard a card: Tap or untap target artifact, creature, or land.

Mind Over Matter

{2}{U}{U}{U}{U}

Enchantment

Discard a card: You may tap or untap target artifact, creature, or land.