Unable to cast March of Burgeoning Life
Was unable to cast March of Burgeoning life in response to an opponents kill spell. Had the appropriate amount and color of mana available, as well as a legal target on the battlefield (the creature that was being targeted by an opponent to be killed). Other instants in my hand illuminated, signifying they could be cast, but this card could not. Tried casting with and without additional green cards in hand to help reduce cost the cost of the March; the card would get “exiled” but when the March attempted to get put on the stack, both cards returned to hand
This also happened to me.
I had the same problem, but as Zachary stated, I was casting at 2, and I needed 1 mana more.
A message saying why the cast is being canceled would help, or at least not letting you choose an X value lesser than the minimum required by your field would be awesome.
the mistake i was making with this card was missing that you have to pay x=1 more than the mv of the creature you're targeting, so the game isn't letting you choose targets because you haven't cast the spell properly