Mirrorb

Mirrorb is a special orb encountered in Peglin that functions as a transformable mirror of another orb. In each battle, a Mirrorb immediately becomes the orb it is set to mimic and behaves identically to that orb for the duration of the encounter. The Mirrorb's baseline health was increased to 777 in the Early Access release, and in v0.7.20 it now begins with Rebound 4 (previously noted as "reflection" in earlier notes).

Because Mirrorb converts into the target orb at the start of an encounter, interactions that operate on orb identity treat it as the transformed orb. Items and effects such as the Hero's Backpack will identify and interact with the Mirrorb as if it were the orb it became. The Mirrorb remains visible in the player's orb inventory when checked during combat, however, which can reveal its original presence.

Mirrorb has two important limitations that affect deck construction and in-battle availability. It cannot transform into another Mirrorb or into itself; the transformation resolves to a non-Mirrorb orb. If a player’s satchel somehow contains only Mirrorbs, those Mirrorbs do not appear among available orbs for that encounter because they must transform into a different orb type. This results in an empty available-orb inventory for the encounter and prevents the player from acting, effectively softlocking the run. Reaching this state is difficult in normal play because an empty satchel is already a softlock condition.

Practical notes for using and encountering Mirrorb:

• Treat Mirrorb as a "wildcard" that will act exactly like its target orb during the fight; plan synergies and item interactions accordingly.
• Avoid relying on Mirrorb to provide unique behavior distinct from the orb it transforms into—any orb-specific benefits or penalties apply as if the Mirrorb were that orb.
• Do not populate a run exclusively with Mirrorbs; ensure you have at least one non-Mirrorb orb in the satchel to avoid an encounter where no usable orbs appear.
• Expect Mirrorb to start encounters with Rebound 4 as of v0.7.20, which affects how it (as the transformed orb) rebounds shots off pegs.