The Parasite

The Parasite is an unlockable passive item.

Effects

 * Tears that deal more than 1.0 damage split into two tears with half damage and half remaining range on impact with obstacles or enemies.
 * Damage less than 1.0 causes the tears to simply disappear.
 * The splitting can keep up as long as the tears have range remaining and the damage of the split tears stays above 0.5.
 * Split tears are scaled down by 0.5x from the parent one, ignoring damage based size reduction.

Synergies

 * : All tears split by the prism will burst into split tears when hitting obstacles.
 * : Two further explosions appear perpendicular to the head's direction of travel when it blows up.
 * : Both tear split effects happen simultaneously.
 * /Spectral tears: When tears pass through solid objects, like rocks, they will split, resulting in many tears shooting out from every rock the original tear passed through.
 * : Two groups of this item's four tears, creating eight additional miniature tears on every point of impact instead.
 * : Bombs split into two bombs upon detonation.
 * : Every time tears bounce, burst tears spawn.
 * : Fed tears split into 12 tears. When tears are minimally fed and hit an obstacle, they will split into 5 Lachryphagy burst tears and Parasite burst tears.
 * /: All tears in tear barrage will burst into split tears when hitting obstacles or enemies.
 * : Repeatedly spawns miniature tears when on top of an enemy, greatly increasing damage.
 * Piercing tears: Split tears form for each hit as the tears pass through the enemies.
 * : The split tears will continue to orbit Isaac, increasing damage potential.
 * : The split tears will be forced directly forward, impacting whatever caused the first tear to split. This increases damage immensely.
 * If all shots connect, effective damage will be multiplied by 2 + log2(damage).
 * When beams hit obstacles, the beam will split; the split beams can split again when hitting other obstacles.
 * 2 beams will be fired perpendicular to the main beam at the closest point of intersection with an enemy or obstacle.

Interactions

 * Overrides The Parasite.
 * Brimstone splits one time when hitting the wall.
 * No effect.
 * : Bombs turn orange and with no other effect.
 * Overrides The Parasite.
 * Split tears can be controlled similarly to normal tears, which results in a large amount of floating tears.
 * The Ipecac tear will spawn two smaller explosive tears when it collides with a solid object, but not with an enemy. These tears can spawn tears on their own as well, potentially leading to huge chain reactions. Having or  is strongly recommended.
 * Drastically decreases range making it less likely for tears to split. The stone will not split.
 * : Knife turns orange with no other effect.
 * Knife splits into two smaller, perpendicular knives on hitting an enemy.
 * : Tears only split when hitting enemies and no longer off the wall or most obstacles.
 * Without any damage increases, Soy Milk tears deal under 1.0 damage and cannot split until the situation is rectified with other items.
 * Overrides The Parasite.
 * Laser splits into two perpendicular beams upon hitting an obstacle.
 * : Overrides The Parasite.
 * No effect.
 * Creep trail turns dark orange but doesn't affect the creep itself.

Seeds
FR6X 2BGZ (Room adjacent to spawn) ZF2M AQ7K (Room adjacent to spawn) XX1T QXN1 (Room adjacent to spawn) NZ7X G61B (First floor Treasure Room) 7NN1 6CZS (Starting item as Eden) GB8R QPMY (First Golden Treasure Room)