Cheapest priced copy (Commander 2016): $0.49 at Card Kingdom, near mint, their price list as of .
Rubblehulk 
Creature — Elemental · */* · Rare · RNA Guild Kit · #95
Rubblehulk's power and toughness are each equal to the number of lands you control.
Bloodrush — {1}{R}{G}, Discard this card: Target attacking creature gets +X/+X until end of turn, where X is the number of lands you control.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.49 to $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 219 | Rare | $0.49 | — |
| Commander 2018 | 189 | Rare | $0.49 | — |
| RNA Guild Kit | 95 | Rare | $0.49 | — |
| Gatecrash | 191 | Rare | $0.49 | $0.49 |
| Gatecrash Promos | 191★ | Rare | — | $0.69 |
2 rulings from Wizards of the Coast
- 24 January 2013If you activate Rubblehulk's bloodrush ability, the value of X is the number of lands you control when that ability resolves.
- 24 January 2013The ability that defines Rubblehulk's power and toughness works in all zones, not just the battlefield.