In non-capture chess, one could build an impenetrable wall around their King in the corner, so Gravitatur is there to tear it apart. I took inspiration here and created this: https://www.chess.com/variants/custom/game/74464690
Very cool, but I didn't understand the rules - is this a game for four players?
P.S. Can pieces eat the gravitator?
It is possible that the pieces could capture Gravitatur, but it appears and disappears on the board before any piece can make a normal chess move.