A rogue star approaching world you use in the last campaing you run. You have ~10 years...

A rogue star approaching world you use in the last campaing you run. You have ~10 years. In 5 years it start to shine so bright its impossible to miss in the night sky. In 7 years in clearly visible in day. What you would do?

>last campaign was a low-fantasy medieval wilderness exploration game
Die amusingly, I guess.

Spend the free time working on my language skills.

players would probably not notice anything.
the local deities would rejoice and eat it to help themselves maintain the tattered fragments of reality a little bit better.
so... things are imperceptibly a little less shitty for everyone I guess.

Toss a sun of ice at it, see what happens.

Seriously start to rethink my life choices.

All hail the burning hate

I can't think of a single setting where that scenario wouldn't end with everyone dying horribly. Stars are, like, really big. Gravity bending, orbit destabilizing big.

I would get a wizard star to completely out class it and make it redundant

Assuming the Wizard knows somehow 10 years in advance, call an emergency magic meeting of everyone with any magic ability at all (including things like Liches in their lairs, since it's in their best interest to have the world they're being evil on continue to exist) to come up with a plan.

And seeing how the plans in the past of this session have gone (and somehow worked), it'd probably end up being something incredibly stupid like opening a massive portal to a realm we don't mind being fucked over like The Abyss to absorb it, and hope to god(s) that whatever horrible squid monsters inside The Abyss don't make use of the only portal ever made big enough for them to enter realspace.

Alternatively- prayer. Lots and lots of prayer to Pelor to go kick that other suns ass.