After the patch that accompanied the launch of Baba Yaga DLC (as of 01/26), the Deep Freeze card is no longer required
for this achievement. So, if you, like me and a few others, didn't get said card for an unknown reason, don't worry, now it unlocks as it should.
So, now, the process is as follows.
· I believe that difficulty affects freezing speed, so choose the highest.
· Turn on the challenge "One way to do it"
· There's no need of any card. Although, you can activate Cold Arms to speed up the process.
· As soon as endurance mode starts, open the chest in the back of the vehicle so you obtain crafting materials for fire arrows. Craft them.
· Time to wait. You can look for a zone with water and jump in it to speed up things. Or, if you have Cold Arms active, hold
to freeze a little faster.
· When Lara drops on her knees and starts losing health, shoot a fire arrow on the ground and step on the fire.
· Enjoy this dodgy achievement.