Magic the Gathering: Mirrodin (Base Set) card 122 Hum of the Radix

*Name: Hum of the Radix
Type: Enchantment
Play Cost: 2 Colorless, 2 Forest
Game Text: Each artifact spell costs more to play for each artifact its controller controls.
Card Text: The elves learned long ago that anything left here slowly vanishes. Now it is a sacred site where the dead are laid to rest and where unnatural magic is erased forever.
*Source: Front of card