Creature - Bird Soldier Spirit 0/0, 3WW (5) Flying Phantom Flock comes into play with three +1/+1 counters on it. If damage would be dealt to Phantom Flock, prevent that damage. Remove a +1/+1 counter from Phantom Flock.1
Illus. David Martin
Remove one counter each time it would be damaged. If it was going to take more than one point of damage, you prevent all the damage and still only remove one counter. [Judgment FAQ 2002/05/28]
The damage prevention ability works even if it has no counters, as long as some effect keeps its toughness above zero. [Judgment FAQ 2002/05/28]
If unpreventable damage is applied to this card, you still remove a counter even though the prevention fails. [Barclay 2002/05/22]
If this card takes damage from multiple sources at once (for example if it is blocked by multiple creatures in combat), it only loses one counter. [Barclay 2002/05/22]