Cheapest priced copy (The List): $9.49 at Card Kingdom, near mint, their price list as of .
Boon Reflection 
Enchantment · Rare · Shadowmoor · #5
If you would gain life, you gain twice that much life instead.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $9.49 to $37.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 10 | Rare | $9.99 | $14.99 |
| The List | 2XM-10 | Rare | $9.49 | — |
| Shadowmoor | 5 | Rare | $13.99 | $37.99 |
3 rulings from Wizards of the Coast
- 7 August 2020In a Two-Headed Giant game, only Boon Reflection's controller is affected by it. If that player's teammate gains life, Boon Reflection will have no effect, even when that life gain is applied to the shared team life total.
- 7 August 2020If an effect would set your life total to a specific number that's higher than your current life total, that effect would cause you to gain life equal to the difference. Boon Reflection will then double the amount of life that effect would cause you to gain. For example, if you have 3 life and an effect says that your life total “becomes 10,” your life total will actually become 17.
- 7 August 2020The effects of multiple Boon Reflections are cumulative. For example, if you control two Boon Reflections, you'll gain four times the original amount of life. If you control three Boon Reflections, you'll gain eight times the original amount, and so on.