Deck takes cards/units away from other player through forcing them to discard (Fallen Oni, Prickly Grenadin, Nametaker), playing them directly from opponent's deck(Cabal Recruiter), stealing them (Pilfer), or playing them from opponent's graveyard (Argenport Ringmaster).
Also puts units into your graveyard (Sporefolk) for direct play with Memory Dredger or Dark Return.
Support cards are direct kill enemy units, lifesteal, pumpable on enemy discards, and make units unblockable.