Cheapest priced copy (Duel Decks: Elspeth vs. Tezzeret): $0.49 at Card Kingdom, near mint, their price list as of .
Angel of Salvation 
Creature — Angel · 5/5 · Rare · Future Sight · #1
Flash; convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Flying
When this creature enters, prevent the next 5 damage that would be dealt this turn to any number of targets, divided as you choose.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $0.49 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Elspeth vs. Tezzeret | 20 | Rare | $0.49 | — |
| Future Sight | 1 | Rare | $0.49 | $3.49 |
| March of the Machine Commander | 170 | Rare | $0.49 | — |
| Time Spiral Remastered | 3 | Rare | $0.49 | $0.49 |
10 rulings from Wizards of the Coast
- 19 March 2021If multiple replacement effects apply to a player or permanent being dealt damage, that player or the controller of that permanent chooses the order to apply them, not the controller of the source of damage.
- 19 March 2021You divide the prevention effects as Angel of Salvation's triggered ability is put onto the stack, not as it resolves. Each target must be assigned at least 1 prevention "shield." You can't choose more than five targets and assign none to a target.
- 19 March 2021If some of the targets become illegal for Angel of Salvation's ability, the original division of prevention effects still applies, but the effects that would have been created for illegal targets aren't created at all.
- 19 March 2021If multiple sources would deal damage to an affected target at once, that target or that target's controller chooses which source's damage to prevent for each "shield."
- 12 January 2024You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.
- 12 January 2024Because convoke isn't an alternative cost, it can be used in conjunction with alternative costs.
- 12 January 2024Tapping a multicolored creature using convoke will pay for {1} or one mana of your choice of any of that creature's colors.
- 12 January 2024When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.
- 12 January 2024Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.
- 12 January 2024If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.