Last time I had the same situation where I couldn't get the battle, which was featured in the weekly BMS, so I wrote about a different one, so let's hope you will be lucky with this one!
Even if your opponent would bring the Obsidian wouldn't change much, because you would counter her with Thaddius, but if his Grund would be Level 4 his Trample ability might change the outcome easily! 😁
Nice game good job! 😉