Yet another card whose Burn effect doesn't need to be nerfed.
Even if you roll 6 per dice, it's still only 1800 damage. You need to activate 3 copies of this card for an OTK, and you need your hand to be empty. And roll 6 a grand total of 9 times (3 times per card). Which has such an astronomically low chance to happen that you might as well call it impossible.
I agree that the burn nerf wasn't necessary at all.
But for the OTK part, you miss some points: If you could activate 3 of this and the damage wasn't nerfed, you would only have to roll a total of 40 with 9 dice. This is a chance of 6% and I wouldn't call that "astronomically" low.
If you use another burn card like Goblin Thief, you only had to roll 35 and the chance increases to 28% and so on.