Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.99 at Card Kingdom, near mint, their price list as of .
Domineering Will 
Instant · Rare · Commander 2014 · #13
Target player gains control of up to three target nonattacking creatures until end of turn. Untap those creatures. They block this turn if able.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.99 to $1.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2014 | 13 | Rare | $1.29 | — |
| Commander Legends: Battle for Baldur's Gate | 719 | Rare | $0.99 | — |
3 rulings from Wizards of the Coast
- 7 November 2014Each of those creatures blocks only if it's able to do so as the declare blockers step begins. If, at that time, one of the creatures is tapped, is affected by a spell or ability that says it can't block, or no creatures are attacking that creature's controller or a planeswalker controlled by that player, then it doesn't block. If there's a cost associated with having the creature block, the player isn't forced to pay that cost, so it doesn't block in that case either.
- 7 November 2014Notably, Domineering Will doesn't give any of the target creatures haste. Unless they have haste due to some other means, they won't be able to attack that turn.
- 7 November 2014The controller of the creatures still chooses which attacking creature each of the three target creatures blocks.