Paragon of Gathering Mists
Creature — Human Wizard
Other blue creatures you control get +1/+1.
, 
: Another target blue creature you control gains flying until end of turn.
Michael C. Hayes
Magic 2015 (M15)
• #73Rulings
Causing a creature to gain flying after it’s been blocked won’t change or undo that block.
(wotc • 2014-07-18)
Rulings
Causing a creature to gain flying after it’s been blocked won’t change or undo that block.
(wotc • 2014-07-18)