When going into the One-Winged Angel form accessible through one of Eve's starting items, the transformation is denoted by the phrase "What a horrible night to have a curse".To drive the point further, you unlock it by completing the Isaac's Awakening challenge, which starts you off with the Spirit Sword, the Trinity Shield, and Mom's Bracelet, which functions similarly to the Power Bracelet.
By holding down fire and then releasing, it unleashes a spin attack, and when Isaac is at full health, it throws out a Sword Beam, much like how the Master Sword typically does.
The Japanese logo for Rebirth is instead a parody of the logo for The Legend of Zelda: A Link to the Past, with a pentagram replacing the Tri-Force. The game's logo is very reminiscent of the first game's.Repentance adds the Mega Mush, and just like the Mega Mushroom, it turns Isaac gigantic and allows him to defeat nearly every enemy just by running into them.Collecting enough mushrooms in Afterbirth turns you into a mushroom-person, strikingly similar to a Toad.One of the messages dispensed from the Fortune Teller is "Your princess is in another castle".The description of the Liberty Cap is " Touch fuzzy, get dizzy".