The last para reads really strangly here and I think would be better-served as being split into 2 paragraphs, as there's 2 separate distinct things happening here
But looks can be deceiving
As you can see, this instant will destroy anything other than lands at instant speed and leave them a sad underpowered 1/1 instead of 3/3 from Generous Gift and Beast Within also you swap the ability there to take out lands
The Future As is common for the immense price spikes we see like this, Stock Up is, ironically, suffering from very short supply
If you want to get fancy, you can use the Executioner as a chump blocker and then before damage use its second ability to kill an unblocked creature
After spending a lot of time and doing a good Tree, Jerry could have just made a decent faded horizon before moving on