Cheapest priced copy (Avatar: The Last Airbender): $4.99 at Card Kingdom, near mint, their price list as of .
Bumi, Unleashed 
Legendary Creature — Human Noble Ally · 5/4 · Mythic · Avatar: The Last Airbender · #348
Trample
When Bumi enters, earthbend 4.
Whenever Bumi deals combat damage to a player, untap all lands you control. After this phase, there is an additional combat phase. Only land creatures can attack during that combat phase.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $4.99 to $16.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender Promos | 211s | Mythic | — | $16.99 |
| Avatar: The Last Airbender | 211 | Mythic | $4.99 | $5.99 |
| Avatar: The Last Airbender | 348 | Mythic | $9.49 | $10.99 |
7 rulings from Wizards of the Coast
- 2 October 2025"Earthbend N" means "Target land you control becomes a 0/0 land creature with haste in addition to its other types. Put N +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped under your control."
- 2 October 2025If a land was animated by earthbend and would go to any zone other than the graveyard or exile, it will not be returned to the battlefield by the delayed triggered ability created by earthbend.
- 2 October 2025The land will retain any other types, subtypes, or supertypes it previously had. It will also retain any mana abilities it had as a result of those subtypes. For example, a Forest that's turned into a creature this way can still be tapped for {G}.
- 2 October 2025You may target a land that is already a creature, perhaps because of a previous earthbend ability. The land will get the +1/+1 counters, gain haste, and have its base power and toughness set to 0/0.
- 2 October 2025Earthbend doesn't give the land you control a color. As most lands are colorless, in most cases the resulting land creature will also be colorless.
- 2 October 2025The restriction that only land creatures can attack applies only to the combat phase created by Bumi, Unleashed, not to any other combat phases that might occur that turn.
- 2 October 2025If the targeted land becomes an illegal target before the spell or ability that includes earthbend resolves, earthbend does nothing. If the spell or ability didn't have other targets, it won't resolve.