If there is a Sacrifice Room on the floor, the familiar will move to doors leading to it. When in the Sacrifice Room, the familiar will move to the side of the spikes.
Upon taken damage from a Sacrifice Room spike, the player gains +0.50 damage. Each time damage is taken, blood will drop in the goblet.
Upon taking damage the 6th time, the blood in the goblet will form blood wings that will grant the player flight
Taking damage on the spike from this point onwards will have no effect.
Notes
The amount of blood collected in the grail persists between floors, so the same Sacrifice Room does not have to be used.
Gallery
The grail familiar filling up, eventually sprouting blood wings
