Potion of Healing

The clever part is that the cantrip is unconditional and the lifegain is not. Two mana buys a card the moment this hits the battlefield, no strings, so the floor is a replacement-value artifact that never sits dead in your hand. The three life is the option you keep in your back pocket: it costs a white mana, a tap, and the artifact itself, which means you cash it in when you actually need the buffer rather than paying for it up front. That split matters for how the card is built. It reads as a lifegain trinket, but the sacrifice clause turns it into a permanent that wants to leave the battlefield, the kind of body an artifact-count or sacrifice-payoff deck is happy to feed. You are never spending a card to gain three life; you are spending an artifact you already got full value from. Splitting a permanent into an enters-trigger and a sacrifice-outlet payoff is a durable design pattern, and this is a clean, cheap instance of it: fixed value on the way in, a small conditional reward on the way out.