Usually, this is an Aura or Enchantment, but certain cards of types can give lifelink
You can run this card alongside gigantic creatures like Emrakul, the Aeons Torn for a heavy surprise attack that can just straight up win the game
This time, my opponent blocks with [c]Wall of Spears[/c], which has first strike
Few of Magic: The Gathering's color identities are as aggressive and focused on dealing damage as the black and red pairing, Rakdos
The budget-friendly versions of this exact effect are dirt cheap and stack: Marauding Blight-Priest ($0.25), Epicure of Blood ($0.34), and Defiant Bloodlord ($0.39)
Still, this color pair could always stand to find more, which makes Discreet Retreat a great addition to these decks