Cheapest priced copy (Guilds of Ravnica): $0.35 at Card Kingdom, near mint, their price list as of .
Undercity Uprising 
Sorcery · Common · Guilds of Ravnica · #210
Creatures you control gain deathtouch until end of turn. Then target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 210 | Common | $0.35 | $0.49 |
4 rulings from Wizards of the Coast
- 5 October 2018The first part of Undercity Uprising’s effect affects only creatures you control at the time it resolves. Creatures you begin to control later in the turn won’t gain deathtouch.
- 5 October 2018If both target creatures are illegal targets by the time Undercity Uprising tries to resolve, the spell doesn’t resolve. No creatures deal damage or gain deathtouch.
- 5 October 2018Remember that a source with deathtouch has to deal damage, but not necessarily combat damage, to destroy another creature. As long as the fighting creature you control has power greater than 0 (and the damage isn’t prevented), the fighting creature you don’t control will be destroyed.
- 5 October 2018If one of the two target creatures is an illegal target by the time Undercity Uprising tries to resolve, no creature deals or is dealt damage. Creatures you control still gain deathtouch.