Spikes in the Binding of Isaac: Rebirth (BOIR)
A Gaping Maw surrounded by Retractable Spikes in the Binding of Isaac: Rebirth (BOIR)

Spikes are obstacles in The Binding of Isaac: Rebirth (TBOIR)

You can walk over the spikes but you get dealt 1 heart of damage, unless you have Flight

There are also Retractable Spikes that retract and extend on timers. You can walk on them safely if you time it correctly to pass over when they are retracted.

Strategy Guide/Tips[edit]