Family's Favor (Extended Art) [Streets of New Capenna Commander] Ultimate Masters or Black Lotus

or Black Lotus

Kaervek's Purge deals damage equal to the creature's power to the creature's controller

You can't win the game and your opponents can't lose the game

Set: Archenemy Type: Sorcery Rarity: Common Cost: {B}{B} Target player draws two cards and loses 2 life

Family's Favor (Extended Art) [Streets of New Capenna Commander] Ultimate Masters or Black LotusSet: Streets of New Capenna Commander Type: Enchantment Rarity: Rare Cost: {2}{G} Whenever you attack, put a shield counter on target attacking creature. Until end of turn, it gains "Whenever this creature deals combat damage to a player, remove a shield counter from it. If you do, draw a card." (If a creature with a shield counter on it would be dealt damage or destroyed, remove a shield counter from it instead.)