Best Bud - The Binding of Isaac

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Best Bud is a familiar in The Binding of Isaac.

Upon taking damage, spawns a white attack fly familiar for the duration of the room.

The fly orbits Isaac and deals 10 damage per tick (150 per second).

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.

This item contributes towards the Beelzebub transformation. Collecting 3 items from this set will grant Isaac flight, converts small enemy flies into Blue Flies, and permanently charms larger enemy flies.

Best Bud can be found in the following item pools:

Name	Weight
Treasure Room	1.0/1.0
Key Master	1.0/1.0
Greed Treasure Room	1.0/1.0
Baby Shop	1.0/1.0

The following tags are applied to this item:

Id	Description
nolostbr	Unavailable for The Lost after obtaining Birthright.
summonable	Can be summoned via Lemegeton.
fly	Contributes towards the Beelzebub transformation.

The following special synergies and interactions for Best Bud have been documented.

Mod	Item	Synergy
---	BFFS!	×2 damage.

* Note that not all possible synergies and interactions are listed here.

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Best Bud

• Upon taking damage, spawns a fly familiar for the current room that orbits Isaac and deals contact damage
• Abyss: x1 locust .5x Isaac's damage