amonkhet mtg cards Festering Mummy FOIL Artist Proof - Magic the Gathering it starts at 1 Aven Initiate [Amonkhet]

Double strike vs Deathtouch A creature with deathtouch allows a creature to instantly destroy any creature it deals damage to

If its not played immediately, I think it would only need one or two more cards to tip it over the edge

If you do yourself and average of 0.33 damage a turn and your average game takes 6 turns you can assume your life total is closer to 18 than 20 in reality

Don't rely on lifelink to do the work here, but rather cards like Rhox Faithmender, Resplendent Mentor, Space-Time Anomaly, or Beacon of Immortality

When in play, a huge number of Planeswalkers can activate their ultimate ability from the moment they hit the board