Cheapest priced copy (Foundations Commander): $0.99 at Card Kingdom, near mint, their price list as of .
Rhonas the Indomitable 
Legendary Creature — God · 5/5 · Mythic · Amonkhet · #182
Deathtouch, indestructible
Rhonas can't attack or block unless you control another creature with power 4 or greater.
{2}{G}: Another target creature gets +2/+0 and gains trample until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.99 to $54.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Amonkhet | 182 | Mythic | $6.49 | $14.99 |
| Foundations Commander | 223 | Mythic | $0.99 | — |
| Jumpstart 2022 | 719 | Mythic | $6.99 | — |
| Amonkhet Invocations | 28 | Special | — | $54.99 |
| Amonkhet Promos | 182s | Mythic | — | $22.99 |
2 rulings from Wizards of the Coast
- 18 April 2017You don't have to attack with another creature with power 4 or greater for Rhonas to be able to attack. The same is true of blocking.
- 18 April 2017Once Rhonas has attacked or blocked, it will remain in combat even if you no longer control another creature with power 4 or greater.