Shanid, Sleepers' Scourge

Legendary matters, as a build-around, usually rewards you for playing more legends than you can reasonably support: the trigger fires, and then you need enough copies of the trigger to make the count worth chasing. This design collapses that math into a single body. The card-draw clause treats legendary lands and legendary spells (creatures, artifacts, enchantments, planeswalkers, instants, sorceries) as a unified fuel line, so a deck stuffed with Legendary permanents stops being a tribal curiosity and becomes an engine that refills itself with every cast. The life loss is the throttle: each draw is a Phyrexian-style payment, which keeps the ceiling honest in a strategy that otherwise wants to flood the board with legends and never stop. The menace grant is the other half of the pitch, and the quieter one. A wide legendary board tends to stall in combat because everything is a priority blocker; handing every legendary creature you control menace turns that clogged board into a coordinated attack, forcing double-blocks the opponent cannot afford across a whole team. The 2/4 frame is deliberately modest for a four-mana three-color commander: this is not a card meant to win by attacking itself, but to make a critical mass of legends both draw cards and punch through. What makes it more than a tribal payoff is that it answers two of the legendary archetype's structural weaknesses (running out of gas, and grinding to a halt in combat) with one four-mana permanent.