I manage to kill heroic Tekahn by burning half of his second deck - the C'Thun's one - with Void Contract, just a bit after I commented here. My Reno deck was almost empty, 2 cards were left, and the boss just changed up his. I'd say it is as effective as it gets.
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I Was Here 2019
I want to make this work effectively somehow....
Let us know if you ever find an effective way to use it
No promises
I manage to kill heroic Tekahn by burning half of his second deck - the C'Thun's one - with Void Contract, just a bit after I commented here.
My Reno deck was almost empty, 2 cards were left, and the boss just changed up his. I'd say it is as effective as it gets.