Main hurdle is getting things IN the trash, so you can attack to digivolve into them. Evolve on into GranDracmon from Matadormon to play out a level 4. K's end of turn will evolve the 4 to SkullGreymon, who will attempt to delete himself, GranDracmon takes the hit instead from Matadormon's inheritable, which will evolve SkullGreymon into the GranDracmon you just deleted. That does several layers of Delete Lowest effects to hopefully clear the board.
Venom is there mostly because I like him, and having tamer stun isn't not useful.