Ventricle Razor

Ventricle Razor is an activated item added in The Binding of Isaac: Afterbirth.

Effects

 * When used for the first time, Isaac creates a blue portal under where he is standing. The next time he uses the item, he creates an orange portal under his feet. Isaac can then walk over either of the portals to teleport instantly to the location of the other one.
 * Activating the item more than twice will replace the older of the two portals.
 * The portals can be placed in any room. However, if a portal leads to a room with a negative grid index (i.e. Devil Room, Angel Room, I AM ERROR room, Crawl Space, Boss Rush, Black Market, Mega Satan room, or Blue Womb portal room), Isaac will not be able to enter the portal.

Interactions

 * : Renders the item useless, as both portals are placed at the same time where the item is activated.

Trivia

 * A ventricle is a hollow part in an organ.
 * The colors of the portals are a reference to the Portal Gun from the Portal series, whose portals share the same colors and functionality.