While Burn comes to mind, it might be better off using Destructive Revelry to destroy Leyline of Sanctity (although Isolation Tower suddenly becomes much more appealing if you are playing budget Mono-Red Burn, since the mono-red builds of Burn don't really have an answer to Leyline of Sanctity)
If youre looking at standard fit, they might run small and ruin your double-sleeving intention by being closer to a perfect fit and now youve gone and wasted your money
You dig three, and then you only draw one, so this is card neutrality, whereas FOF is card draw, and then the former is too powerful, but Ponder has never been on its power level
What is the most popular MTG set right now
I dont think I need to tell you how good Skullclamp is, but its just as broken here as it is in any other deck