Host Hat

Host Hat is a passive item added in The Binding of Isaac: Afterbirth.

Effects[]

Enemy shots that hit Isaac have a 25% chance to be blocked. When a projectile is effectively blocked, Host Hat fires 3 bullets similar to the Host's.
- Bullets fired from Host Hat use Isaac's Damage and Range, and copy Isaac's Tear effects.
  - The bullets do not use Isaac's Shot Speed.
- Can block:
  - Fireballs (e.g. from Crackle), but their lines of fire harm Isaac.
  - Fire projectiles (e.g. from Mega Satan).
  - Obstacles thrown by Polty or Kineti.
- Does not block:
  - Explosive projectiles (e.g. from Gurgle).
  - Lasers or beams.
  - Lines of fire from fireballs.
  - Projectiles from Big Bony, Coal Boy, Danny.
Grants immunity to explosions.
Grants immunity to bullets falling from above.

Notes[]

Does not protect against exploding mushrooms.
Isaac becomes immune to Mom and Satan's stomp attacks, as they are considered explosions. This makes the item very valuable if trying to unlock The Forgotten, as it will protect Isaac from the effects of the Broken Shovel.
This item is invaluable in Greedier Mode as nearly all of Ultra Greedier's attacks are considered explosions.
One of only two items that grant full immunity to explosive damage, the other being Pyromaniac.
Although Host Hat has firing animation that expose itself after it blocks a tear, it can still block tears in this state, firing bullets as much it blocks.

Synergies[]

Dr. Fetus / Ipecac: Isaac becomes immune to his explosives.
Epic Fetus: Isaac becomes immune to his own airstrikes.

Interactions[]

The following items that change the property of Isaac's tears affect Host Hat's bullets:
The following items that modify Isaac's tears do not affect Host Hat's bullets, aside from stat changes (if present):
20/20 / Keeper and other multi-shot effects: Do not add Host Hat's bullets.
Anti-Gravity / Tractor Beam: Does not affect Host Hat's bullets, aside from stat changes.
Cone Head: Cone Head's chace of blocking effect is applied first. Tears blocked by Cone Head do not cause Host Hat to fire.
- This leaves Isaac 36% chance to negate tears in any way.
Dead Eye: Host Hat's bullets grant the damage multiplier, but do not reset it even when they miss.
Eye of Greed / Lead Pencil: Host Hat's bullets are not counted for shots fired.
Gnawed Leaf: Tears can be reflected while Isaac is invulnerable.
Hallowed Ground: Host Hat's chance of blocking effect is applied first.
- This leaves Isaac 60% chance to negate tears in any way.
Host Hat: Additional copies of this item, such as from Diplopia / Crooked Penny, have no effect.
Infamy: Infamy's chance of blocking effect is applied first. Tears blocked by Infamy do not cause Host Hat to fire.
- This leaves Isaac 60% chance to negate tears in any way.
Isaac's Heart: Tears can be reflected when hitting the heart, not Isaac.
Holy Card / Holy Mantle: Host Hat's chance of blocking projectiles is applied before the shield, allowing it to be saved.
Metal Plate: Host Hat's chace of reflecting effect is applied first. Tears blocked by Host Hat are not reflected by Metal Plate.
- This leaves Isaac 40% chance to negate tears in any way.