Ember Gale

Oracle Text

Creatures target player controls can't block this turn. Ember Gale deals 1 damage to each white and/or blue creature that player controls.

Card Rulings

5/1/2008 Ember Gale will deal damage only to white and/or blue creatures the targeted player controls at the time it resolves. However, it will prevent all creatures that player controls from blocking that turn, even if those creatures enter the battlefield later.