Cheapest priced copy (Tarkir: Dragonstorm Promos): $0.49 at Card Kingdom, near mint, their price list as of .
Glacierwood Siege 
Enchantment · Rare · Tarkir: Dragonstorm · #386
As this enchantment enters, choose Temur or Sultai.
• Temur — Whenever you cast an instant or sorcery spell, target player mills four cards.
• Sultai — You may play lands from your graveyard.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tarkir: Dragonstorm Promos | 189p | Rare | $0.49 | $0.49 |
| Tarkir: Dragonstorm Promos | 189s | Rare | — | $0.59 |
| Tarkir: Dragonstorm | 189 | Rare | $0.49 | $0.49 |
| Tarkir: Dragonstorm | 386 | Rare | $0.59 | $0.79 |
3 rulings from Wizards of the Coast
- 4 April 2025Glacierwood Siege’s Sultai ability doesn’t allow you to activate abilities (such as cycling) of land cards in your graveyard.
- 4 April 2025Glacierwood Siege’s Sultai ability doesn’t change the times when you can play those land cards. You can still play only one land per turn, and only during your main phase when you have priority and the stack is empty.
- 4 April 2025If you somehow control Glacierwood 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.