Tidal Flats

Text:

: For each attacking creature without flying, its controller may pay . If that player doesn't, creatures you control blocking that creature gain first strike until end of turn.

Rulings:

• 10/4/2004 Can be used more than once in a turn. Each time, the opponent can pay to prevent giving first strike to a creature, but this payment only stops the current activation and not future activations of Tidal Flats.
• 10/4/2004 The payment is made when the Tidal Flats effect resolves.
• 10/4/2004 First Strike is granted to your creatures currently blocking non-Flyers when this effect resolves.