Thalia's Lancers
Most tutors search by card type: an Island, a creature, an instant or sorcery. This one searches by a supertype that cuts across the entire card pool, fetching any legendary card regardless of type, color, or function. That breadth is the whole pitch. A legendary creature, a planeswalker, a legendary artifact, a legendary land, even a legendary enchantment all answer the same call, which makes the effect a flexible bridge into whatever singular threat a deck is built around. The 4/4 first-striker matters less than the search, but it keeps the card from being a do-nothing once the tutor resolves: a body that trades up in combat and pressures the board while the fetched card sits in hand waiting for its turn. The cost of all this is concentration, both in mana (double white at five) and in deckbuilding, since the trigger is dead weight if the library holds nothing legendary worth finding. That constraint is what keeps the effect fair: the card asks for a top end that is a roster of individually powerful cards, and offers little to a deck that just wants a five-drop with first strike. As an enabler, it sits in a small class of effects that turn the legendary supertype itself into a searchable resource, treating "legendary" not as a deckbuilding restriction but as a tutor target.
