HISTORY AND LORE
When HS designers asked themselves "what if players could create their own cards?" they developed Kazakus. This is a misterious character, rumors says he is a dragon and no one knows where the portal in his stomach leads to. He is the leader of the Kabal and they profit by selling potions, but there is a hidden plan behind all of it, where Kazakus is trying to mind controll people, developing the Kaza-Kola and the enchanted chains they use to stabilize their potions.
"The mysterious leader of the Kabal is NOT a dragon, and does NOT deal in illegal potions. Any public statements to the contrary will be met with litigation and Dragonfire Potions."
"Kazakus is a Zandalari troll and the sinister and mysterious leader of the Kabal. No one really knows his true origins, but nor does anyone really care; instead, what they care about are the corrupted mana potions he sells. His motto is "Power should be attainable for anyone, at a price". Kazakus' tusks have become contorted and twisted due to the corrupted mana he uses, and the large red circle on the center of his stomach is a portal that goes right through his body to an unknown destination, possibly another dimension."
- Hearthstone description of Kazakus.
So when this hero was designed he was meant to have the same idea:
what if heroes could create their own spells?
There are 10 possibilities to be explored. This is a very complex hero and because of that the talent choices were very simplified, so players won't have to burn their brains to play him.
Playing Kazakus
must feel very challenging, since he has so many option to chose that it will require high game perception. This is a very hard character but playing him well must feel very satisfaying.
Once player is familiarized with him and develop his own playstyle some potions will become favorites and Memorizing them will make the game a lot easier. However you must always be ready to cast a different potion in certain situations and change your tatics on different team compositions. Because of that he requires more game awareness than most heroes in order to be mastered.
Playing him must feel like you are free to do whatever you want and a huge sense of agency.
Playing as his ally
Kazakus is very complex so you don't know what to expect from him. Just be sure to be very aware to use the possibilities he creates. Good comunication is more important than usual but as the game goes on you'll propably notice a pattern on his playstyle and that will make it easier to follow up.
Its nice to ask early game what kind of potions he will use the most or what is his focus: supporting team, damaging heroes, laning control, disabling enemies...
Playing against him
You can expect pretty much anything from him so you will have a hard time antecipating his moves. He can counter a lot of strategies if the player is doing a good job so the higher your rank, the more you must be aware for his flaws. Kazakus is squeashy so you'll want to prioritize him when isolating or bursting down an enemy.
However humans will mostly develop a pattern of gameplay and you'll be able to notice which potions are being used the most on that match, which can help you overcome it.
This is a very hard hero to play. Not because you'll have to memorize the recipes, that's probably the easiest part. But because you'll have to know when each ability will be more useful. When to buff, when to debuff, when to slow instead of polymorph, when to heal instead of damage. Kazakus can do pretty much anything and he can do it 3 times in a row, so it's kinda hard to balance everything and keep it simples, but I belive it's actually close to that when I do the math. You can reach up to double the power or double the time or anything between it and this versatility is what makes his talent choices so important to fit your team and counter your enemies.
You will always face the same options, no matter which talent you got on last tier, so you can get the same talent over and over and it will stack it's effect.
-There are 6 talent options, 2 options for each basic ability (Q, W, E), where 1 will increase it's POWER EFFECT and the other will increase EFFECT DURATION of any potion that use the buffed ability.
-For exemple, if you get Felbloom Talent it will increase power of abilities that use Heart of Fire (W), so if now you create the potion 2 (10% increased damage for 2s) it will instead increase it's damage by 12% for 2s. This talent will also empower potions 4, 5, 6 and 8.
-Another exemple, if you get the Mystical Wool it will increase the duration of potions that uses Icecap (E). So if now you create the potion 7 (reduces damage by 10% for 2s) it will last 20% more, meaning it now slows for 2.25 seconds. It will also increase duration of potions 3, 6, 8 and 9.
-Every talent will buff Kaza-Kola either on power or duration.
It's important to notice Kazakus is very versatile and that makes him very powerful, so when picking a talent his power will not be buffed as most heroes, making it more even as the games advances. Yet, if for exemple, you pick Mystical Wool every time you will end with a 100% duration effect, meaning the all affect potions will last 4s, what is a big amount of time for a TF.
Hope I made it clear!
Thanks for your time!!