Cheapest priced copy (The List): $0.35 at Card Kingdom, near mint, their price list as of .
Havoc Demon 
Creature — Demon · 5/5 · Rare · Legions · #74
Flying
When this creature dies, all creatures get -5/-5 until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.35 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eternal Masters | 90 | Uncommon | $0.39 | $0.49 |
| Legions | 74 | Rare | $0.49 | $5.99 |
| The List | EMA-90 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 8 June 2016All creatures on the battlefield when Havoc Demon’s triggered ability resolves are affected. Ones that enter the battlefield or become creatures later in the turn are not.