Cheapest priced copy (Commander 2018): $0.49 at Card Kingdom, near mint, their price list as of .
Duskmantle Seer 
Creature — Vampire Wizard · 4/4 · Mythic · Gatecrash · #159
Flying
At the beginning of your upkeep, each player reveals the top card of their library, loses life equal to that card's mana value, then puts it into their hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2018 | 176 | Rare | $0.49 | — |
| Ravnica: Clue Edition | 188 | Mythic | $0.99 | — |
| Conspiracy: Take the Crown | 202 | Rare | $0.49 | $0.49 |
| Gatecrash | 159 | Mythic | $0.99 | $1.99 |
2 rulings from Wizards of the Coast
- 24 January 2013The cards put into hands this way are not “drawn.” For example, you couldn’t reveal a card with miracle put into your hand this way (but it also won’t count as the first card you’ve drawn this turn either).
- 24 January 2013The loss of life is simultaneous. If this causes both players to end up at 0 or less life, the game will be a draw. In a multiplayer game, players with 0 or less life will lose the game.