Grants -1 tear delay and reduces range. When tears hit an object or deplete their range, they spawn 4 smaller tears, whose range and damage scale with Isaac's.
Quote
"Bursting shots + tears up"
Effects
When Isaac's normal tears disappear (either from hitting the ground or hitting something else), they spawn 4 smaller tears.
Each smaller tear deals half of Isaac's normal damage.
Tear size multiplier: 1.2x.
Split tears are scaled down by 0.6x from the main ones, ignoring damage based size reduction.
-10 range
-1 tear delay (increased rate of fire)
Since this directly affects tear delay instead of changing the tears stat, it allows Isaac's rate of fire to go over the normal maximum rate.
Tear delay decreases are more noticeable and are a greater increase to DPS when the tears stat is high.
Synergies
Angelic Prism - All tears split by the prism will burst into split tears.
Bob's Rotten Head - Bob's Rotten Head splits into four smaller heads on detonation.
Compound Fracture - When bone tears split into bone shards after hitting an obstacle or enemy, the bone shards will split into 4 smaller bone shards after hitting the ground.
Haemolacria - All normal Haemolacria burst tears burst again into 4 split tears.
Ipecac - Main tear splits into four explosive splash tears. The split tears can still damage Isaac. Having Host Hat or Pyromaniac is strongly recommended.
Fire Mind - Main tear splits into four explosive splash tears. The split tears can still damage Isaac. Having Host Hat or Pyromaniac is strongly recommended.
Lead Pencil - All tears fired will splash after landing. Increased damage potential only noticed when firing into groups, due to the random pattern of each tear when it splashes.
Monstro's Lung - All tears fired will splash after landing. Increased damage potential only noticed when firing into groups, due to the random pattern of each tear when it splashes.