21 Swamp
4 Breeding Pit
1 Coat of Arms
2 Contamination
1 Crypt Rats
2 Howl from Beyond
4 Lord of the Pit
4 Nocturnal Raid
3 Plague Rats
4 Ravenous Rats
4 Razortooth Rats
6 Relentless Rats
2 Subversion
2 Swarm of Rats
Sideboard:
4 Bog Rats
2 Crypt Rats
1 Plaguebearer