So....a random bit of crowdsourcing data for a quiz at home. It's sometimes a bad meme that 'Most lightsaber blades wins', but which Jedi or Sith (so not Grievous) actually used the most blades at once?

Two is pretty common, and there are a few examples of three - such as Darth Trays (telekinesis), Kao Can Darach (one single and one double-blade) and Kylo Ren (Crossguard). The only force user I can think of with four is Pong Krell (two double-blades).

Anyone able to offer an advance on four?