Riot Games shipped a Teamfight Tactics 13.18 B-patch on Sept. 15 for Set 9.5 Runeterra Reforged: Horizonbound, addressing balance issues within the Bilgewater trait and Nilah as a carrier.
The balance of the Bilgewater trait and its four-cost carrier Nilah has been rocky since the start of TFT Set 9.5 PBE testing. At the start of testing, Bilgewater was a weak trait that had an overpowered four-cost Nilah wreaking havoc due to a Rapid Firecannon bug that was resolved prior to the official launch of Horizonbound through Patch 13.18. With the bug resolved, it became apparent that the Bilgewater trait was too strong. The TFT balance team addressed this through smaller balance changes to avoid “balance thrash,” according to game designer Stephen “Mortdog” Mortimer.