Kaladeshi Mystic

Flying, haste, hexproof
{t}, {2}{w}{w}: Target creature gains +3/+3, flying,
and hexproof until the end of your turn.
{t}, {2}{u}{u}: Opponents can't cast creature spells
until the beginning of your next turn.
"The mystics of Kaladesh? I'd rather be fighting
alongside them than against them."