F.E.V. is a passive item in Glacier's Laboratory, a mod for The Binding of Isaac.

+0.2 speed.
+0.76 damage.

Some enemies may transform into tainted variant when they take lethal damage. If the enemy doesn't have tainted variant, it becomes mutated instead.

If mutated, the enemy will receive one of the following mutation effects:
Red: Periodly fires a big red projectile and a beam of light toward Isaac. The projectile bounces around the room and gradually increases in speed.
Yellow: Drops a yellow projectile upon taking damage, which has randomized effects on impact.
Green: Has a poisonous aura, periodly creates a normal copy of itself that has 20% of its health. Upon death, spawns 5 normal copies of itself that has 1 health.
Blue: Periodly teleports around the room and switches between vulnerable and invulnerable.

Defeat these enemies again spawns one of the rewards which prioritizes as follows:
• A Golden Key: when Isaac doesn't have any.
• A Golden Bomb: when Isaac doesn't have any.
• A Mega Chest: 30% chance.
• 12 random pickups.

This item contributes towards the Spun transformation. Collecting 3 items from this set will grant Isaac +2 damage, +0.15 speed and spawn a random pill.

F.E.V. can be found in the following item pools:

The following tags are applied to this item:

• Download Glacier's Laboratory from the Steam Workshop.