The Ether Flower

The Ether Flower would be a rare flower.  It could be found in a mountain cave (very rare) or in an end city inside a small farm of them.  (at least one per city.)  These flowers could only grown if they have zero natural light touching them.  They also could only be Bonemealed by using special bone meal called Mystical bone meal.  This is crafted with one bone and two ender pearls giving you 3 mystical bone meals.  Mystical bonemeal works like normal bonemeal on the ether flowers, but n other plants, it works like a x2 effected bonemeal.  The Flowers, when harvested (They have a three stage growth process from seedling, to plant, to bloom) at the bloom stage can be used with honey bottles to make the potion of Elixir.  This potion cannot stack upon itself and can only be made stronger once.  When drank, it gives you 2 temporary hearts that disappear when they are fully taken via damage delt to you.  The flowers themselves look like the shape of a rose and have a end void color scheme to  them.  Thoughts?