Whenever an opponent draws a card, you may pay . If you do, draw a card.
"Ideas drift like petals on the wind. I have only to lift my face to the breeze."
Illustrated by Edward P. Beard, Jr. · Mirrodin · #205
There are no rulings for Mind's Eye.
Whenever an opponent discards a card, you may draw a card.
Landfall — Whenever a land you control enters, you may pay . If you do, draw a card.
Whenever a source an opponent controls deals damage to you, if this artifact is untapped, you may draw a card.
Whenever a creature you control with power equal to its toughness enters, you may pay . If you do, draw a card.
Whenever you cast a multicolored spell, draw a card.
: Add one mana of any color.
Whenever you gain life, you may pay , where X is less than or equal to the amount of life you gained. If you do, draw X cards.