Cheapest priced copy (March of the Machine Commander): $2.49 at Card Kingdom, near mint, their price list as of .
Hero of Bladehold 
Creature — Human Knight · 3/4 · Mythic · Mirrodin Besieged · #8
Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
Whenever this creature attacks, create two 1/1 white Soldier creature tokens that are tapped and attacking.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $2.49 to $27.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin Besieged | 8 | Mythic | $5.49 | $27.99 |
| March of the Machine Commander | 188 | Mythic | $2.49 | — |
| Magic Player Rewards 2011 | 8 | Mythic | — | — |
| Mirrodin Besieged Promos | 8★ | Mythic | — | $4.49 |
| Tarkir: Dragonstorm Commander | 119 | Mythic | $2.49 | — |
3 rulings from Wizards of the Coast
- 1 June 2011You choose which opponent or planeswalker an opponent controls that each token is attacking when it is put onto the battlefield.
- 1 June 2011Although the tokens are attacking, they never were declared as attacking creatures (for purposes of abilities that trigger whenever a creature attacks, for example).
- 1 June 2011Whenever Hero of Bladehold attacks, both abilities will trigger. You can put them onto the stack in any order. If the token-creating ability resolves first, the tokens each get +1/+0 until end of turn from the battle cry ability.