Cheapest priced copy (Fifth Dawn): $0.79 at Card Kingdom, near mint, their price list as of .
Rude Awakening 
Sorcery · Rare · Modern Masters · #160
Choose one —
• Untap all lands you control.
• Until end of turn, lands you control become 2/2 creatures that are still lands.
Entwine {2}{G} (Choose both if you pay the entwine cost.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $0.79 to $9.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 92 | Rare | $0.79 | $9.99 |
| Duel Decks: Garruk vs. Liliana | 22 | Rare | $0.99 | — |
| Duel Decks Anthology: Garruk vs. Liliana | 22 | Rare | $0.99 | — |
| Modern Masters | 160 | Rare | $0.99 | $3.99 |
| World Championship Decks 2004 | jn92sb | Rare | $0.79 | — |
2 rulings from Wizards of the Coast
- 1 August 2008A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn’t matter how long the permanent has been a creature.
- 7 June 2013Lands that enter the battlefield or otehrwise come under your control after Rude Awakening resolves won’t be affected.