Fungal Clump is an Pre-Hardmode, Expert Mode-exclusive accessory obtained from the Treasure Bag dropped by Crabulon. It summons a free Fungal Clump minion that attaches to enemies, damaging them and spawning blue healing orbs that home in on the player and heal the player for 25% of the damage the clump deals. The healing orbs travel farther if the player is holding a summon weapon. The Fungal Clump occupies no minion slots.
The Fungal Clump has a base damage of 10, which can be boosted with the player's damage-boosting equipment.
However, its damage is affected by the summon damage nerf mechanic. As a result, it will do very little damage and by extension be incapable of producing healing orbs on most enemies if the player is holding a non-summoner weapon.
Due to the healing orbs' limited range, the player must stand in close proximity to the minion in order to benefit from its lifesteal.
It behaves similarly to the minions produced by Dank Staff and Blood Clot Staff; when used with Dank Creeper or Blood Clot minions, the Fungal Clump is likely to "stack" with the other minions and move identically to them.
The Fungal Clump cannot be equipped if the player is wearing The Amalgam accessory, and vice versa.
When equipped, the Fungal Clump produces a large ring of light around the player, making it usable for filling in the player's map by repeatedly equipping it and unequipping it.
This ring of light also triggers when the player produces a minion past what they are allowed to have.
In previous versions of the mod, Fungal Clump also caused Crabulon to become passive. With the accessory equipped, both the player and the boss became incapable of harming one another.