Dryad's Caress

Oracle Text

You gain 1 life for each creature on the battlefield. If W was spent to cast Dryad's Caress, untap all creatures you control.

Card Rulings

10/1/2005 The spell checks on resolution to see if any mana of the stated color was spent to pay its cost. It doesn’t matter how much mana of that color was spent.
10/1/2005 If the spell is copied (such as with Twincast), the copy will never have had mana of the stated color paid for it, no matter what colors were spent on the original spell.