Game 3: On turn 2 (14:59) I think you can argue for casting Chalice of the Void X=1 or Talisman of Resilience. The downside of casting Chalice of the Void X=1 is that Slickshot Show-Off will still trigger in response to the cast of a non-creature spell regardless of it the spell resolves. Though Chalice of the Void X=1 would have mitigated ~6 damage. So, it may have been worth it in retrospect.
Game 1,3rd play vs burn, maybe the mistake was not to play the chalice instead of going for mana for the mycospawn
Game 3: On turn 2 (14:59) I think you can argue for casting Chalice of the Void X=1 or Talisman of Resilience. The downside of casting Chalice of the Void X=1 is that Slickshot Show-Off will still trigger in response to the cast of a non-creature spell regardless of it the spell resolves. Though Chalice of the Void X=1 would have mitigated ~6 damage. So, it may have been worth it in retrospect.