Poison-Blade Mentor

Deathtouch on a cheap black body is ordinary; deathtouch as something you hand out on attack is the design worth pausing on. The attack trigger turns this into a lord of a peculiar kind, one that lends a single keyword rather than pumping stats, and the keyword it lends is the one that rewrites combat math outright. A tribal deck built around it stops caring what its Assassins' toughness numbers are, because in any block or trade the defender loses whatever it commits. Point the trigger at a hexproof threat, an unblockable body, or a large midrange creature that was already trading up, and every attack step becomes a question the opponent cannot answer profitably. The 2/1 frame is fragile on the crackback, so the card leans on its own native deathtouch to punch above that toughness and on its trigger to weaponize the rest of the board. That native deathtouch also makes it a genuine rattlesnake on the ground: sitting back, it trades with almost any attacker that comes across, so the defensive stance is real even though the trigger only fires when it swings. It reads as narrow, and it is; without other Assassins the second line is dead text. But inside the tribe it converts a wide, cheap board into a table of creatures the opponent has to respect one at a time, a more interesting engine than a static anthem and a sharper reason to run the type than most lords offer.