Witch's Clinic

A colorless-producing land that saves its second ability for the format its whole existence assumes: the singleton, always-on commander in the zone. Granting lifelink to a commander is a strange thing to buy at two mana and a tap, because the effect only pays off when your commander is dealing damage, and it does nothing in a topdeck war, nothing against removal, nothing when your general is sitting home. What it does is convert damage into a life swing, which is why the ideal targets are not just the oversized attackers that already dominate combat but the commanders whose damage is not combat damage at all: a Niv-Mizzet firing off draw triggers, a Heartless Hidetsugu halving the table, any general whose text box is a life-total problem for everyone else. Lifelink applies to all damage the creature deals, so a single activation can turn a burn-shaped commander into a life engine. The colorless mana keeps it from being dead on turns you are not activating, the concession that lets it earn a land slot at all. It belongs to the small cluster of utility lands built around the command zone rather than the graveyard or the stack, a lane that treats "your commander" as a reliable, repeatable target the way older lands treated "a creature you control." The lifelink is optional, always available, and priced by its mana cost even at instant speed; the only real question is whether your deck runs a general worth pointing it at.