Cheapest priced copy (The List): $0.35 at Card Kingdom, near mint, their price list as of .
Dreadwurm 
Creature — Wurm Horror · 5/4 · Common · Zendikar Rising · #100
Landfall — Whenever a land you control enters, this creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The List | ZNR-297 | Common | $0.35 | — |
| Zendikar Rising | 100 | Common | $0.35 | $0.49 |
| Zendikar Rising | 297 | Common | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 8 November 2024A landfall ability triggers whenever a land you control enters for any reason. It triggers whenever you play a land, as well as whenever a spell or ability puts a land onto the battlefield under your control.
- 8 November 2024A landfall ability doesn't trigger if a permanent already on the battlefield becomes a land.
- 8 November 2024Whenever a land you control enters, each landfall ability of the permanents you control will trigger. You can put them on the stack in any order. The last ability you put on the stack will be the first one to resolve (As a result, you can have those abilities resolve in the order of your choosing.).