River's Grasp

Sorcery, 3{U/B} (4)
If {U} was spent to cast River's Grasp, return up to one target creature to its owner's hand. If {B} was spent to cast River's Grasp, target player reveals his or her hand, you choose a nonland card from it, then that player discards that card. (Do both if {U}{B} was spent.)¹
Illus. Steven Belledin

Gatherer Card Rulings [Nov 2009]

• 5/1/2008: The spell cares about what mana was spent to pay its total cost, not just what mana was spent to pay the hybrid part of its cost.
• 5/1/2008: The spell checks on resolution to see if any mana of the stated colors was spent to pay its cost. If so, it doesn't matter how much mana of that color was spent.
• 5/1/2008: If the spell is copied, the copy will never have had mana of the stated color paid for it, no matter what colors were spent on the original spell.
• 5/1/2008: When you cast the spell, you choose its targets before you pay for it.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/10)	Shadowmoor (Uncommon)