Desiccated Naga

The drain ability here is conditional on a class of permanents you may not even be running: a working 3/2 body that only becomes a repeatable life-swap engine if you control a Liliana planeswalker. That gate is the entire design. Without a Liliana, this is a vanilla beater priced to the body and nothing more; with one, the activated ability turns every spare four mana into a two-point Drain Life that pads your own total while it whittles an opponent's. The card was built as a payoff for a deck already committed to a particular planeswalker rather than a standalone engine, which is why the drain is tucked behind a control clause instead of a graveyard cost or a tap requirement: the deckbuilding work is done before the card ever resolves. It rewards a Liliana-centric shell that wants a recurring source of inevitability, a body that holds the ground while the planeswalker ticks, and a mana sink for the back half of a grindy game. Outside that shell it does not do anything its stat line does not already promise. As a piece of conditional design it is honest about what it asks for: name your Liliana, and this becomes a slow clock you can leave on the table; play it without one, and the second half of the text might as well be reminder text.