After Recent Update Lae Zel the Githyanki Warrior seems to be broken
I see a similar Bug was reported in OCT 2022 down below.
On a Windows PC, but not using Steam.
In Historic Ranked match, Lae Zel's specialization action failed to deliver the effects of the specialization in this case specialized blue and did not receive the card that is supposed to be taken from opponent's deck. Also Lae Zel's self exile was not triggered when targeted by an opponent's spell (at least I'm pretty sure it should have triggered in this situation but not 100%) Both problems can be seen in the short video that I uploaded. To recreate this Simply play lae zel in a historic ranked match and try to specialize blue.
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