Cheapest priced copy (Ravnica: Clue Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Havoc Jester 
Creature — Devil · 5/5 · Uncommon · Ravnica: Clue Edition · #138
Whenever you sacrifice a permanent, this creature deals 1 damage to any target.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica: Clue Edition | 138 | Uncommon | $0.35 | — |
| Commander Masters | 230 | Uncommon | $0.35 | $0.49 |
| Core Set 2021 | 149 | Uncommon | $0.35 | $0.49 |
| The List | M21-149 | Uncommon | $0.35 | — |
4 rulings from Wizards of the Coast
- 23 June 2020Havoc Jester's ability triggers when you sacrifice it. If you sacrifice other permanents at the same time, it triggers for them as well.
- 23 June 2020If you sacrifice a permanent as part of casting a spell or activating an ability, Havoc Jester's ability will resolve before that spell or ability.
- 23 June 2020Havoc Jester's ability is a triggered ability, not an activated ability. It doesn't allow you to sacrifice a permanent whenever you want; rather, you need some other way of sacrificing permanents.
- 23 June 2020A legendary permanent that is put into a graveyard because of the “legend rule” isn't sacrificed.