Cheapest priced copy (Jumpstart): $1.29 at Card Kingdom, near mint, their price list as of .
Maelstrom Archangel 
Creature — Angel · 5/5 · Mythic · Jumpstart · #454
Flying
Whenever this creature deals combat damage to a player, you may cast a spell from your hand without paying its mana cost.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $1.29 to $64.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conflux | 115 | Mythic | $2.79 | $64.99 |
| Dominaria United Commander | 158 | Mythic | $1.49 | — |
| Jumpstart | 454 | Mythic | $1.29 | — |
| The List | CON-115 | Mythic | $1.49 | — |
4 rulings from Wizards of the Coast
- 1 February 2009If you cast a card “without paying its mana cost,” you can't choose to cast it for any alternative costs, such as evoke or the alternative cost provided by the morph ability. However, you can pay optional additional costs, such as conspire, and you must still pay mandatory additional costs, such as the one on Goldmeadow Stalwart.
- 1 February 2009If you want to cast a card this way, you cast it as part of the resolution of Maelstrom Angel's triggered ability. Timing restrictions based on the card's type (such as creature or sorcery) are ignored. Other casting restrictions are not (such as “Cast [this card] only before attackers are declared”).
- 1 February 2009If you cast a card this way, you're casting it as a spell. It can be countered.
- 1 February 2009If you cast a card with X in its cost this way, X must be 0.