Blue Flame Doppelganger

When Blue Flame Doppelganger enters the battlefield it may become a copy of target creature except that it's still blue in addition to it's other colors, and it has "Whenever you attack you may
pay {u/r} and discard a card, if you do Blue Flame
Doppelganger gets +1/+1 and gains Flying until
end of turn."
Adamant (If {u}{u}{u}{u} was spent to cast Blue
Flame Doppelganger it gets +1/+1.