Cheapest priced copy (Ravnica Allegiance): $0.99 at Card Kingdom, near mint, their price list as of .
Angel of Grace 
Creature — Angel · 5/4 · Mythic · Ravnica Allegiance · #1
Flash
Flying
When this creature enters, until end of turn, damage that would reduce your life total to less than 1 reduces it to 1 instead.
{4}{W}{W}, Exile this card from your graveyard: Your life total becomes 10.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.99 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica Allegiance | 1 | Mythic | $0.99 | $6.99 |
7 rulings from Wizards of the Coast
- 25 January 2019Angel of Grace's triggered ability doesn't prevent damage. It only changes the result of damage dealt to you. For example, a creature with lifelink that deals damage to you will still cause its controller to gain life, even if that damage would reduce your life total to less than 1.
- 25 January 2019In a Commander game, combat damage you're dealt by a commander is still tracked, even if it doesn't change your life total.
- 25 January 2019Angel of Grace's triggered ability doesn't stop loss of life from effects that say that you lose life.
- 25 January 2019For a player's life total to become 10, that player gains or loses the appropriate amount of life. For example, if your life total is 2, Angel of Grace's last ability will cause you to gain 8 life; alternatively, if your life total is 20, it will cause you to lose 10 life. Other cards that interact with life gain or life loss will interact with this effect accordingly.
- 25 January 2019In a Two-Headed Giant game, after resolving Angel of Grace's triggered ability, damage dealt to you and/or your teammate that would reduce your team's life total to less than 1 reduces it to 1 instead.
- 25 January 2019In a Two-Headed Giant game, the activated ability of Angel of Grace causes you to gain or lose life so that your team's life total becomes 10.
- 25 January 2019If you have less than 1 life and somehow haven't lost the game, damage dealt to you reduces your life total further below 0 (as normal).