I have to lol...
I'd get it, but might it work better as a Gravity card (with the Chimera and such) if you took the combined values and added them to the Adept|Sage divided by 5 or 6. Healing is sorta a or thing, in my opinion.
looks OP...forget massive dragon... armagio ftw...
Since it's transferring 1/4 of the target creature's "mass" to you, would it be good to subtract 1//4 of that creature's stats? For example, an 8 | 30 Massive Dragon would become 6 | 23, or something. Also, could you use this on enemy creatures?