I have a character that is a paladin of Tyr. I was hoping for a warrior who can fight well but still is afiry good with spells, so I'm considering multi-classing him into a cleric, but I'm not sure of what domains a cleric of Tyr can take, any help with this would be most appricaited.

The 'Faiths of Faerun' subsection of 'Realmslore' in this here forum.

So here: https://efupw.com/efu1-forum/topic/12/129/major-deities/index.html?amp;postdays=0&postorder=asc&start=15

The domains being: Good, Knowledge and War. Pick two.

Edit: Sorry, just realised this is the 'DM Q&A' forum. Didn't mean to intrude :)

Although the rules weren't followed, the information was accurate.