Cheapest priced copy (Duskmourn: House of Horror): $0.49 at Card Kingdom, near mint, their price list as of .
Omnivorous Flytrap 
Creature — Plant · 2/4 · Rare · Duskmourn: House of Horror · #192
Delirium — Whenever this creature enters or attacks, if there are four or more card types among cards in your graveyard, distribute two +1/+1 counters among one or two target creatures. Then if there are six or more card types among cards in your graveyard, double the number of +1/+1 counters on those creatures.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror | 192 | Rare | $0.49 | $0.49 |
| Duskmourn: House of Horror | 322 | Rare | $0.49 | $0.79 |
| Duskmourn: House of Horror Promos | 192p | Rare | $0.49 | $0.49 |
| Duskmourn: House of Horror Promos | 192s | Rare | — | $0.59 |
One ruling from Wizards of the Coast
- 20 September 2024To double the number of +1/+1 counters on a permanent, put a number of +1/+1 counters on it equal to the number it already has. Other effects that interact with putting counters on it will interact with this effect accordingly.