In fairness Flare isn't an especially good card. Still, I'm in agreement: it's FAR too strong, especially in a color where that fight means it's a 1-mana creature removal plus a draw.
A one-card draw is worth about 1 mana. You can sometimes tag another effect on: giving a creature flying or a spell flash, for example. Scrying 2 and drawing a card for 1 mana at Sorcery speed is an INCREDIBLE cantrip.
Sticking good removal on it is frankly insane. Giving trample, on the other hand, would probably be fine...although I'm still concerned about cheap card draw in a color that has the potential to get as many big threats as Green can manage.