Combos Utilizing Filth

entomb filth into the graveyard and tap trailblazer to turn a land into a swamp, you have unblockable creatures.

discard filth to graveyard as soon as poss. cast evil presences on non-black players and all your creatures will be unblockable.

if your oponent controls black cards you will deal 20 domage with swampwalk

get filth into graveyard somehow. enchant opponent's land with tainted well making it a swamp. all your creatures have swampwalk and are unblockable

attach lure and venom onto filth, attack with filth, destroy all his creatures, and make all your creatures unblockable

lay filth use culling the weak lay tainted then all your creatures have swampwalk and they have a swamp

bury all of the incarnations and play the respectable land color and you have awesome abilities on the 3rd turn

use the cap on yourself and as long as you have the lands, you get the incarnations abilities

use entomb to put filth in graveyard then play intimidation so your creatures will have fear and swampwalk. unblockable.

just make a black deck full of small creatures and 4 filths. don't cast a spell in the opening turn, and discard a filth. you now have a black deck that can kill other black decks, a rare beast!