Spy Combo's namesake plan is milling itself with Balustrade Spy and reanimating a huge Lotleth Giant or similar with Dread Return, so Thraben Charm's graveyard-exile mode is a genuine blowout, stripping away their reanimation targets and Dread Return fuel entirely. Shattered Acolyte adds cheap, efficient bodies to pressure them before their engine comes online. Cut slower ramp cards since speed matters — you want to be applying pressure and disrupting their graveyard before they assemble Balustrade Spy plus Dread Return. Time the graveyard exile for their end step after a big self-mill spell but before they can flashback or reanimate.