Sharp Straw is an activated item added in The Binding of Isaac: Afterbirth †.
Effects[ | ]
- Damages all enemies in the room.
- The damage dealt is equal to Isaac's current tear damage plus 10% of the enemy's max health.
- Has a 15% chance to drop
Half Red Hearts when it damages an enemy.
- May also drop Half Soul Hearts. Half red hearts will always drop when Isaac has at least one red heart container; otherwise, half soul hearts will drop.
- The amount of enemies damaged does not improve the chance.
May also drop 
Notes[ | ]
- When used on Delirium, this item should be used when it isn't transformed to deal the most damage, as Delirium doesn't have his armor up when in his true form.
- For enemies that can disappear or go underground, it only affects them if they are visible.
- The Sharp Straw works exceptionally well with Samson, giving the chance to collect large amounts of health per floor, allowing more damage to be taken resulting in more damage being dealt per use.
Synergies[ | ]
- Book of Virtues: Enemies have a chance to spawn wisps in the outer ring when they’re killed by Sharp Straw. Using it in a room with no enemies does not grant a wisp. Despite Sharp Straw having a timed charge, the wisps persist between rooms.
- Car Battery: Damage is doubled and two half hearts may be dropped.
Interactions[ | ]
- Ipecac: Only provides a +2 damage bonus instead of +40.
In-game Footage[ | ]
Trivia[ | ]
- Before Booster Pack #5, Sharp Straw would instantly kill Big Horn if used while his hands were out due to their arbitrarily high health.
- Sharp Straw was originally an unofficial item which was supposed to showcase the modding capabilities of Afterbirth+ in the PAX 2016 livestream. However, all items included in the demo were later added to the final game.
- In the livestream, Sharp Straw had the name 'Isaacula', a different appearance, and a recharge time of six rooms.
 The Binding of Isaac: Rebirth
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