M:tG card similarity search
3RR · Sorcery
Players play a Magic subgame, starting at 1 life and using their libraries as their decks. For the rest of the main game, if a source would deal damage to a player who didn't win the subgame, it deals double that damage to that player instead.
| Name | Mana | Type | Text | 
|---|---|---|---|
| Quest for Pure Flame | R | Enchantment | Whenever a source you control deals damage to an opponent, you may put a quest counter on Quest for Pure Flame. Remove four quest counters from Quest for Pure Flame and sacrifice it: If any source you control would deal damage to a permanent or player this turn, it deals double that damage to that permanent or player instead. | 
| Bitter Feud | 4R | Enchantment | As Bitter Feud enters the battlefield, choose two players. If a source controlled by one of the chosen players would deal damage to the other chosen player or a permanent that player controls, that source deals double that damage to that player or permanent instead. | 
| Plated Pegasus | 2W | Creature — Pegasus | Flash (You may cast this spell any time you could cast an instant.) Flying If a spell would deal damage to a permanent or player, prevent 1 damage that spell would deal to that permanent or player. 1/2 | 
| Don't Try This at Home | 1R | Enchantment | If a hot source you control would deal damage to a player or permanent, it deals that much damage plus 1 instead. (Something is hot if it has hot things in its art, like fire or explosions.) {1}{R}, Sacrifice Don't Try This at Home: It deals damage equal to twice the number of hot cards in your graveyard to target creature or planeswalker. | 
| The Flame of Keld | 1R | Enchantment — Saga | (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Discard your hand. II — Draw two cards. III — If a red source you control would deal damage to a permanent or player this turn, it deals that much damage plus 2 to that permanent or player instead. | 
| Jade Monolith | 4 | Artifact | {1}: The next time a source of your choice would deal damage to target creature this turn, that source deals that damage to you instead. | 
| Urza's Armor | 6 | Artifact | If a source would deal damage to you, prevent 1 of that damage. | 
| Sphere of Reason | 3W | Enchantment | If a blue source would deal damage to you, prevent 2 of that damage. | 
| Sphere of Law | 3W | Enchantment | If a red source would deal damage to you, prevent 2 of that damage. | 
| Insult | 2R | Sorcery | Damage can't be prevented this turn. If a source you control would deal damage this turn, it deals double that damage instead. |