FOILCheapest priced copy (Tarkir: Dragonstorm): $1.49 at Card Kingdom, near mint, their price list as of .
Hollowmurk Siege 
Enchantment · Rare · Tarkir: Dragonstorm Promos · #192s
As this enchantment enters, choose Sultai or Abzan.
• Sultai — Whenever a counter is put on a creature you control, draw a card. This ability triggers only once each turn.
• Abzan — Whenever you attack, put a +1/+1 counter on target attacking creature. It gains menace until end of turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $1.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tarkir: Dragonstorm Promos | 192p | Rare | $1.99 | $2.49 |
| Tarkir: Dragonstorm Promos | 192s | Rare | — | $2.29 |
| Tarkir: Dragonstorm | 192 | Rare | $1.49 | $1.99 |
| Tarkir: Dragonstorm | 387 | Rare | $1.79 | $2.49 |
2 rulings from Wizards of the Coast
- 4 April 2025An ability that triggers when counters are put on a permanent will trigger if that permanent somehow enters the battlefield with those counters.
- 4 April 2025If you somehow control Hollowmurk Siege and no choice was made for it (perhaps because another permanent on the battlefield became a copy of it), it has neither of the two abilities.