Cheapest priced copy (Guilds of Ravnica): $0.35 at Card Kingdom, near mint, their price list as of .
Hypothesizzle 
Instant · Common · The List · #GRN-178
Draw two cards. Then you may discard a nonland card. When you do, Hypothesizzle deals 4 damage to target creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 178 | Common | $0.35 | $0.49 |
| Breaking News | 48 | Uncommon | $0.35 | $0.49 |
| The List | GRN-178 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 12 April 2024You don't choose a target creature at the time you cast Hypothesizzle. Rather, a second "reflexive" ability triggers when you discard a nonland card. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal. Notably, the triggered ability isn't a crime, but the reflexive triggered ability potentially is.