Tomasz Wróblewski (born 2 June 1980), stage name Orion, is a Polish musician, best known as the bassist for the extreme metal band Behemoth. Since 1997, he also is a member of symphonic black metal band Vesania as a lead vocalist and guitarist.
Wróblewski was born in Warsaw. In 2002, he became bassist of doom metal band Neolithic and was a member of the group until 2006 when they were disbanded. In 2003, he joined Behemoth as session bassist. After the departure of Mateusz "Havoc" Śmierzchalski, Orion switched to guitar. In 2004, Behemoth was joined by session guitarist Patryk "Seth" Sztyber, while Orion took bass again, and became an official member. In 2010 with members of defunct band Neolithic, Orion formed the rock band Black River. The group eventually split up after releasing two albums, due to vocalist Maciej Taff's retirement from the music industry because of health condition.
Orion's bass playing technique was fingerstyle until in late 2017 where he switch to picks and still plays it with picks since for Behemoth.
Orion is endorsed by ESP/Ltd, Darkglass and Markbass.
At the Arena ov Aion – Live Apostasy (2008)
Abyssus Abyssum Invocat (2011)
I Loved You at Your Darkest (2018)
2002: Wrath ov the Gods / Moonastray
Vader – And Blood Was Shed in Warsaw (DVD, 2007, guest appearance)
Vulgar – I Don't Wanna Go To Heaven (EP, 2009, guest appearance)
Vulgar – The Professional Blasphemy (2010, guest appearance)
My Riot – Sweet Noise (2011, guest appearance)
Leash Eye – V.I.D.I. (2011, record producer)
Devilish Impressions – Simulacra (2012, guest appearance)
Sammath Naur – Beyond the Limits (2012, guest appearance)
ESP Tom Araya Signature 4-String Basses (tuned G#-C#-F#-B and B-E-A-D)
Custom ESP TA 5-String Bass (tuned G#-C#-F#-B-E)
LTD F-255FM Series Bass, LTD B-500 4-String Bass, LTD TA-600 Bass, Spector Rex 5 Bass, JB Custom 5-String Bass (Based on the B.C. Rich Beast Bass)