Geistcatcher's Rig

Oracle Text

When Geistcatcher's Rig enters the battlefield, you may have it deal 4 damage to target creature with flying.

Card Rulings

9/22/2011 The target creature with flying is chosen when the ability triggers and goes on the stack. You choose whether or not Geistcatcher’s Rig will deal 4 damage to it when then ability resolves.