Torpor Orb is strong against this lifegain-matters deck. It shuts off the creature-entering lifegain from Haliya, Case of the Uneaten Feast, Hinterland Sanctifier, Aunt May, and Liliana the Faultless, and it also stops Moseo's enter trigger. It does not stop Amalia Benavides Aguirre's explore, Starscape Cleric, or Lunar Convocation, because those trigger off lifegain rather than creatures entering. Its job is to slow their lifegain, not to turn off the whole engine. Erode is clean removal for their key threats like Amalia (the ward costs 3 life) or Enlightened Confidant, and letting them fetch a basic land is an acceptable cost against a grindy midrange deck. Doorkeeper Thrull doesn't pressure their lifegain engine fast enough and is outclassed on rate, while Esper Origins is too slow against their card advantage suite. We keep the full landfall core, since the plan is to race their lifegain engine before Amalia grows to exactly 20 power and destroys every other creature.