Cheapest priced copy (Commander 2018): $0.49 at Card Kingdom, near mint, their price list as of .
Righteous Authority 
Enchantment — Aura · Rare · Commander 2018 · #188
Enchant creature
Enchanted creature gets +1/+1 for each card in its controller's hand.
At the beginning of the draw step of enchanted creature's controller, that player draws an additional card.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 188 | Rare | $0.49 | — |
| Return to Ravnica | 189 | Rare | $0.49 | $0.99 |
One ruling from Wizards of the Coast
- 15 April 2013The triggered ability is put onto the stack after you have already drawn your card for the turn.