Gives Isaac a 5% chance to fire tears that create rifts where they land, which damage nearby enemies and pull in enemies, pickups, and tears/shots from all sources for 2 seconds.
Rifts deal 0.5x Isaac's damage twice each tick (3x Isaac's damage per second), and enemy shots pulled into the rift will damage other enemies.
The size of the rift increases with Isaac's damage.
The chance to fire a rift is vaguely affected by Luck, but caps at a certain point, and is never guaranteed to trigger.
Rift tears can be used to move pickups that might be located behind spikes.
Placement of the rifts is easier with items which provide a degree of control over tears, e.g. Eye of the Occult.
Because the pull of Ocular Rift affects enemy shots, it can be used defensively to dismantle the curtains of bullets that Isaac would otherwise have to dodge. This is especially useful for bosses like Hush and Delirium.
Brimstone: Rifts may appear where a brimstone beam hits rock, walls or enemies.