Cheapest priced copy (Commander 2016): $0.49 at Card Kingdom, near mint, their price list as of .
Clan Defiance 
Sorcery · Rare · Starter Commander Decks · #220
Choose one or more —
• Clan Defiance deals X damage to target creature with flying.
• Clan Defiance deals X damage to target creature without flying.
• Clan Defiance deals X damage to target player or planeswalker.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 187 | Rare | $0.49 | — |
| Ravnica: Clue Edition | 182 | Rare | $0.49 | — |
| Gatecrash | 151 | Rare | $0.49 | $0.49 |
| Starter Commander Decks | 220 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 24 January 2013The value of X is the same for each mode you choose.
- 24 January 2013You can choose just one mode, any two of the modes, or all three. You make this choice as you cast Clan Defiance.