'Defeat the Yeti and complete the challenge quest'
Okay, I'm not gonna lie to you, I found this quest quite difficult. My usual spells/strategies just didn't work with the Yeti.
The first problem you will encounter is that connecting blue gems will give the Yeti HP, so unless you have a really good spell that needs blue gems, I suggest you ignore them as best you can.
The second problem is that the Yeti has an attack (Crushing Kill/Blow - please correct me in comments) that deals 999 damage. As the name suggests, you are pretty much screwed if this spell is used.
The first good point is that the Yeti needs to collect 65 red gems to use the spell.
The second good point is that connecting red gems harms the Yeti.
So, my suggestion to you would be go for skulls and red gems as your primary target, and if none are available, try to build up your spells/attacks.
Of course, if you are still struggling, you can a) come back later, with better spells and stats or b) change the difficulty.
I will add other people's suggestions here:
- You could also try using poisons and eliminating red gems using sorcerer magic. Thanks to NLi10.
- Use Chasm when there are many purple gems. Thanks to WoodlandSpirit.
- Disarm, plus any 'strike' spells, takes off loads of damage. Thanks to idub76.
- The "Weaken" spell removes one gem and takes away half of that colored mana from your opponent), keeping the Yeti's red mana from getting too high. Thanks to TeamBrian1020.
EDIT: The quest can be activated by visiting Bram One-Eye in Valoren. This must be done *after* defeating the Polar Bear. Thanks to DaKenster.
EDIT2: Once you have defeated the Yeti, you must turn in the quest to get the achievement.
Good luck.Please either comment below or send me a Personal Message if you have any comments or improvements.