By constantly digging deeper into the deck, players guarantee access to critical bounce events, low-cost counter cards, and essential tech pieces precisely when they need them
Scavenger's Talent is a nice 1-cost class that gives you a food whenever something dies, and once you level it up to three, you'll get big stuff out of you graveyard for sacrificing stuff, and getting cards in your graveyard shouldn't be a problem with its level two ability, especially because you'll (hopefully) be gaining and sacrificing multiple foods a turn.
Cards similar to SZW - Fenrir Sword include ZW - Asura-aanval, Elemental HERO Solid Soldier, Maan Magir
For an additional black and generic mana, the attacking Rat gains deathtouch until the end of turn
The red color identity screams aggressive red deck
If you happen to own a special variant of either of these MTG cards, you can be very content indeed right now