You can cast a spell using flashback even if it was somehow put into your graveyard without having been cast
The main thing to keep in mind is that there is no right or wrong answer, there is only what works for you and the particular deck youre building
Can You Respond to Forecast
Those who believe in the video point to the convincing animations and illustrations, arguing that replicating them, especially in a video format, would be difficult for trolls
Even if youre not getting back three haymakers youre still able to get three creatures for six mana total, on an effect that cant really be interacted with with single target graveyard removal they need to nuke your graveyard before the spell resolves
I also like that it is aggressive in combat because if there is a deck at the table with higher power level than the rest I can target it with my attacks to form a coalition of the willing to try and help take them out early