Flash
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Flying
Other white creatures get +1/+1.
Celestial Crusader has 5 listed printings; the most valuable is the printing from DDF at US$0.33 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
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