...Yeah, that's even MORE of a buff. You're then giving it free gravity pull, for no quanta or card cost. Do not want! D:
Due to your lack of using the 'quote' comment function, I am not sure if you're response was to my post or choongmyoung...
Were it to mine, here is my reply:
If SoFo is summoned early-game (first turn via Nova, for example) it gets basically
two activation opp's for the summoning player if the opponent isn't also rushing (pillarless, maybe?) and therefore deals no damage to the SoFo during it's turn of Gravity Pull'ing (2nd turn) before losing Grav Pull state and having to WAIT A TURN to get it back to be able to accretion without dying or to NOT WAIT and get Black Hole after just two accretions.
If SoFo is summoned mid-to-late game, then it is quite likely to take heavy damage during the first Grav Pull state (at 0/16) and either die or get low enough that normal CC could kill it - if not then the risk works and you get three accretions from it.
Did you pay attention that is doesn't simply get Gravity Pull and keep it forever? The turn after Grav Pull it loses Grav Pull, and so on back-and-forth. Perhaps this helps your stance of "even MORE of a buff"...