Sack Head

Shop   (page 4, column 19, line 3)

Sack Head is a passive item added in the Binding of Isaac: Afterbirth expansion.

Effects

• All bomb, coin, key, card, rune, pill, and battery pickups have a 33% chance to be replaced with sacks.
  • This includes pickups spawned by anything: chests, slot machines, special shopkeepers, etc.
• Spawns a sack upon pickup.

Notes

• Shopkeepers have a chance to drop this item when destroyed.
• Troll Bombs can also be replaced with sacks.

Synergies

• Burnt PennyGives a 50% chance to drop a bomb when money is collected. / Flat PennyGives a 50% chance of spawning a key upon collecting a penny.: When picking up a penny, a sack might drop instead of a key or a bomb. The sack might contain more pennies which leads to more sacks.
• Contract From BelowDoubles the number of pickups and chests spawned after clearing a room or performing some other triggering action (such as using a blood donation machine), but reduces the chance for any pickups to spawn at all.: Doubles the sacks received after clearing a room.
• D20Rerolls all pickups in the current room.: Sacks often contain batteries. The D20 rerolls opened sack items into batteries and more sacks. Rinse and repeat.
• Equality!Turns pickups into their doubled versions while Isaac's numbers of coins, bombs, and keys are equal.: Sacks may drop new sacks while Equality! is active, potentially resulting in massive amounts of resources from a single sack.
• Guppy's TailIncreases chance of finding gold chests and normal chests, but reduces chance of finding pickups.: Chests often contain sacks, making most gold chests pay for themselves and then some.
• Head of the KeeperIsaac's tears become coins and now have a chance to drop pennies on the floor upon successfully hitting an enemy.: Enemies hit by Isaac's tears have a chance of dropping sacks instead of coins.
• Lucky RockEach obstacle destroyed drops one coin.: Blown up rocks have a high chance of dropping sacks instead of pennies.
• Petrified PoopGreatly increases the chances of a pickup dropping when destroying poop.: Has a high chance to drop sacks by destroying poop.
• Safety ScissorsTroll bombs turn into Bomb pickups before they explode. Mega troll bombs turn into 1+1 free bombs before they explode. + Curse of the TowerCauses Isaac to spawn 6 troll bombs on the floor every time he gets hit, similar to the Anarchist Cookbook mechanic.: Each defused bomb has a chance to be replaced with a sack, so up to six sacks can spawn from taking damage.
• Safety ScissorsTroll bombs turn into Bomb pickups before they explode. Mega troll bombs turn into 1+1 free bombs before they explode. + Anarchist CookbookSpawns six troll bombs around the room.: Each defused bomb has a chance to be replaced with a sack, so up to six sacks can spawn on use. In addition, sacks can spawn batteries, which allows this to be used multiple times.

Gallery

• 

  Afterbirth item and trinket concepts, including Sack Head.