This card is severely not worth it.
Assuming that it gives 12 HP and
in 6 turns, that means you need only 2
pillars and a heal to match it.
Healing it is pointless, too, when it's got such a low turn-out, and needs cards dedicated to healing it.
I'd start by making it a permanent with an activated sacrifice trigger. That way, we have much more control over when this bursts, and doesn't need support.