Nightshade Peddler

Pairing this 1/1 with anything turns deathtouch from a printed keyword into a granted one, and that shift is the entire point: instead of building around a single body that already carries the ability, you choose at the moment of the bond which threat you want to make lethal-on-contact. Link it to something with reach and you have a green answer to fliers; pair it onto a creature with a deal-damage trigger and one point of damage kills regardless of toughness. The keyword runs both directions through the bond, so the Peddler itself also deters attackers, but the partner is the prize. Soulbond rewards keeping both halves alive rather than chaining the effect from body to body: lose either one and the deathtouch evaporates instantly, leaving whatever you hung the keyword on stripped bare and the Peddler back to a lone 1/1 whose only remaining function is to bond again when your next creature enters. Putting a board-wide deterrent behind a fragile two-mana frame is the trade the design asks you to accept. Among deathtouch enablers, the rarer trick is handing the keyword to a creature that has already resolved and is sitting in your line of attackers, which is what makes the effect quietly oppressive in any strategy that wants its damage sources to trade up against the whole board.