Cheapest priced copy (Modern Horizons 3 Commander): $9.99 at Card Kingdom, near mint, their price list as of .
Scute Swarm 
Creature — Insect · 1/1 · Rare · The Zeta Set · #205
Landfall — Whenever a land you control enters, create a 1/1 green Insect creature token. If you control six or more lands, create a token that's a copy of this creature instead.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
13 printings · $9.99 to $23.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror Commander | 197 | Rare | $10.99 | — |
| Modern Horizons 3 Commander | 245 | Rare | $9.99 | $12.99 |
| New Capenna Commander | 310 | Rare | $12.99 | — |
| Outlaws of Thunder Junction Commander | 205 | Rare | $9.99 | — |
| Zendikar Rising Promos | 203★ | Rare | — | $13.99 |
| Zendikar Rising Promos | 203p | Rare | $10.99 | $15.99 |
| Zendikar Rising Promos | 203s | Rare | — | $17.99 |
| Secret Lair Drop | 7048 | Rare | $19.99 | $23.99 |
| The Zeta Set | 84 | Rare | — | — |
| The Zeta Set | 205 | Rare | — | — |
| The Zeta Set | 326 | Rare | — | — |
| Zendikar Rising | 203 | Rare | $9.99 | $12.99 |
| Zendikar Rising | 308 | Rare | $12.99 | $15.99 |
6 rulings from Wizards of the Coast
- 25 September 2020If Scute Swarm leaves the battlefield before its triggered ability resolves, the token will still enter the battlefield as a copy of Scute Swarm, using Scute Swarm's copiable values from when it was last on the battlefield.
- 25 September 2020The token copy will have Scute Swarm's ability. It will also be able to create copies of itself.
- 25 September 2020The token copy won't copy counters or damage marked on Scute Swarm, nor will it copy other effects that have changed Scute Swarm's power, toughness, types, color, and so on. Normally, this means the token will simply be a Scute Swarm, but if any copy effects have affected the original Scute Swarm, the token will take those into account.
- 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 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.).
- 8 November 2024A landfall ability doesn't trigger if a permanent already on the battlefield becomes a land.