Serpent's Kiss

Serpent's Kiss is a passive item added in Afterbirth.

Effects

 * Grants poison tears, dealing damage over time when inflicted.
 * Inflicts poison on enemies who make contact with the character.
 * Enemies who are killed by poison damage have a chance to drop Black Hearts.

Synergies

 * Athame: The black ring created by the Athame applies the poison from Serpent's Kiss. This means enemies killed will have a higher chance to drop black hearts.
 * Invulnerability: Contact while invincible poisons enemies.
 * Scorpio: Grants the character a 100% chance of firing poison tears.
 * Second Hand: Extends the duration that enemies stay poisoned, dealing more damage over time.
 * Soy Milk: The low damage and high fire rate increases the chance of enemies and bosses being poisoned.
 * Tech X: Since Tech X deals its damage quickly, it's more likely to deal the killing blow to enemies reducing the chance of black hearts dropping.
 * The Common Cold: Adds to the chance of firing poison tears, based on the character's Luck stat.

Seeds
NFMD MEVX (Treasure room adjacent to spawn) E14Y Q0Z7 (Treasure room adjacent to spawn) QZC2 FNKQ (Treasure room adjacent to spawn) 7BXL YJFT (Treasure room two down from spawn then one to the left )