Template:Archmage Khadgar strategy
Archmage Khadgar, being the final boss of The Dalaran Heist is a grand challenge to surmount and will truly test the deck you've been building up to this point.
The Kirin Tor Elementals' ability to recast spells will become overbearing if you allow it, prioritize killing them above all else, specially considering he has the means to make duplicates of them using 
Molten Reflection and 
Echo of Medivh, which will cast again creating even more Kirin Tor Elementals, quickly spiraling out of control. Thankfully, these minions have rather small stats and Khadgar doesn't have ways to buff them outside of the 
Bananas created by 
Banana Buffoon, giving you the opportunity to destroy them with waveclear, single-target spells or trade with them using your own minions before they become an issue.
If there are larger issues to deal with, such as Malygos, change priorities but try and destroy as many Kirin Tor Elementals as you can.
A stupid, albeit possible strategy is to use Millhouse Manastorm if you were risky enough to pick him up. While all of his dangerous spells will be casted twice for free, his card draw spells like 
Research Project will almost always be used without caution, putting into Fatigue a lot quicker. 
EVIL Propaganda can also win you the game, because you can take all of his elementals.
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