Spider Egg Sacs adds a new egg sac blocks that can be placed in the world. There currently is no crafting recipe for it as it is intended for use in structure mods or maps. However they will function as intended if you do wish to add a crafting recipe for them.
When placed the block will randomly decide whether it's one of three versions. Those versions are:
1. Trap Egg Sac: This egg sac can be opened by right clicking with a sword or axe, once opened a negative splash potion will fly out.
2. Item Egg Sac: The same as the trap egg, can be right clicked with a sword or axe to open, once opens it will spawn random items from the specified loot table.
3. Baby Spider Egg: This egg cannot be opened by right clicking, it instead opens when a player is in a certain radius (configurable). You can also configure the number of baby spiders you wish to spawn.
