When Dragonsoul Knight’s activated ability resolves, Dragonsoul Knight will gain flying and trample in addition to its other abilities. However, becoming a Dragon will make it lose all other creature types. It will no longer be a Human or a Knight.
If Dragonsoul Knight gains flying after blockers have been declared, it won’t cause those blocks to change.
You can activate Dragonsoul Knight’s ability more than once during a turn. The second time it resolves, it will probably have no visible effect other than giving Dragonsoul Knight another +5/+3.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Justin Sweet
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