Yes yes, I'm aware of it. I was going to write in that last post that this type of damage is taking the best from AoE and single target spells, but then I remembered scenarios where both single target and AoE spells like RoF would be better than this one.
So, in your example, while this spell + sacrificed Flesh Recluse would kill 3 and deal dmg to 4th Phase Recluse, RoF for again less cards and less quanta would kill all Phase Recluses on the table.
Advantage of RoF type spells are that they hit all creatures regardless of their position (I'm assuming this spell would start damaging at position 1, and then spread on the next position if there is damage left, thus its possible to "block" it by playing bigger creatures first, and then some Butterflied RoL).
Single target spells have the advantage of picking their preferred target.
So, while this type of damage is definitely interesting, it still has its weak sides compared to other types, and shouldnt be overpriced in such manner. Killing your own creature (thus losing one card from your deck AND future damage that creature would do) is not a small price to pay.