Flying



A creature with flying cannot be blocked except by other creatures with either flying or reach. Creatures with flying can block other creatures with or without flying.

Example
Aaron is attacking with a Griffin Sentinel. Ned controls a Canyon Minotaur, a Giant Spider and a Nephalia Seakite. When Ned goes to block Aaron's Griffin, he may block it with either the Spider, as it has reach; or the Seakite, as it also has flying, but he cannot block with the Minotaur.

Comprehensive Rules
702.9. Flying


 * 702.9a. Flying is an evasion ability.


 * 702.9b. A creature with flying can't be blocked except by creatures with flying and/or reach. A creature with flying can block a creature with or without flying.


 * 702.9c. Multiple instances of flying on the same creature are redundant.