I recently started playing Faeria and I think it would be helpful if you were able to cancel an action while youre casting a card, before you chose a target or an option from the cards effect. For example if you cast the legendary creature “Aurora, Myth Maker”, you cannot take the action back, even before choosing the target of the cards effect. Its the same for cards with the effect “choose”. I think its especially helpful for new players so they don’t mess up their whole game from one card they played wrong. I for example thought that you can choose the card Aurora as a target of her own effect since she is also a friendly creature.
This is something that has been suggested multiple times and I absolutely agree!