This clever lockdown creates an absolute perimeter around you and your planeswalkers by exploiting a brilliant asymmetry in combat restrictions. Sandwurm Convergence shuts down the skies entirely by ensuring creatures with flying can't attack you, while Magus of the Moat handles the ground level by forbidding anything without flying from launching an assault. Together, these two enchantments completely blank the combat phase against you, leaving your opponents utterly helpless while Sandwurm Convergence slowly builds a menacing army of 5/5 green Wurm tokens on each of your end steps to finish the game.