Cheapest priced copy (Modern Horizons): $1.79 at Card Kingdom, near mint, their price list as of .
Weather the Storm 
Instant · Common · Modern Horizons · #191
You gain 3 life.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
4 printings · $1.79 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 1 Timeshifts | 24 | Uncommon | — | $6.99 |
| Modern Horizons | 191 | Common | $1.79 | $6.99 |
| Strixhaven Mystical Archive | 58 | Rare | $2.79 | $5.99 |
| Strixhaven Mystical Archive | 121 | Rare | $7.99 | $14.99 |
3 rulings from Wizards of the Coast
- 14 June 2019Storm counts spells cast before the spell with storm was cast. Spells cast after the spell with storm was cast but before the storm ability resolves aren't counted.
- 14 June 2019The copies storm creates are created on the stack, so they're not cast. Abilities that trigger when a player casts a spell (such as storm) won't trigger.
- 14 June 2019The storm ability and the copies it creates all resolve before the spell with storm. They resolve even if the spell with storm is countered.