Oloro, Ageless Ascetic

The third line of text is the whole reason this card exists: a passive trigger that fires from the command zone whether or not the body ever touches the battlefield. Most legendary creatures reward you for casting them; this one was deliberately built to reward you for leaving it home, ticking up two life every upkeep while you keep your six mana for answers and threats. That command-zone clause is the structural innovation, and it does its job before the game has even properly begun: a free, repeatable two-life cushion that no opponent can interact with, because there is nothing on the board to remove. The design tension it resolves is the one every Esper control deck used to face: how to install passive value without committing a fragile permanent for a sweeper to punish. Oloro answers by gaining you life from a place removal cannot reach. The engine half (pay one to convert each lifegain trigger into a card and a point of drain) only comes online once you actually cast the 4/5 and put it on the battlefield, which reframes the relationship between the two halves: the command-zone gain is the unpunishable baseline, and committing the body is the upgrade you choose when you want every two-life tick to cantrip and chip. That split, between an effect you get for free and one you pay a creature's worth of exposure to unlock, is exactly what made it a foundational test case for how much a command-zone-only ability could be allowed to do.