Cheapest priced copy (Jumpstart): $5.99 at Card Kingdom, near mint, their price list as of .
Momentous Fall 
Instant · Rare · Rise of the Eldrazi · #197
As an additional cost to cast this spell, sacrifice a creature.
You draw cards equal to the sacrificed creature's power, then you gain life equal to its toughness.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $5.99 to $37.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2019 | 173 | Rare | $6.49 | — |
| Jumpstart | 411 | Rare | $5.99 | — |
| Rise of the Eldrazi | 197 | Rare | $6.49 | $37.99 |
3 rulings from Wizards of the Coast
- 15 June 2010The sacrificed creature’s last known existence on the battlefield is checked to determine its power and its toughness.
- 15 April 2013You must sacrifice exactly one creature to cast this spell; you cannot cast it without sacrificing a creature, and you cannot sacrifice additional creatures.
- 15 April 2013Players can only respond once this spell has been cast and all its costs have been paid. No one can try to destroy the creature you sacrificed to prevent you from casting this spell.