Cheapest priced copy (Commander 2016): $19.99 at Card Kingdom, near mint, their price list as of .
Benefactor's Draught 
Instant · Rare · Commander 2016 · #21
Untap all creatures. Until end of turn, whenever a creature an opponent controls blocks, draw a card.
Draw a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 21 | Rare | $19.99 | — |
3 rulings from Wizards of the Coast
- 8 November 2016You must cast Benefactor’s Draught before blockers are declared in order to draw any cards from its delayed triggered ability.
- 8 November 2016If multiple copies of Benefactor’s Draught resolve in one turn, each creates a delayed triggered ability and each will trigger when its condition is met.
- 8 November 2016Each player will have a chance to cast instants and activate abilities after Benefactor’s Draught’s delayed triggered abilities have resolved, before combat damage is dealt.