Cheapest priced copy (Foundations Commander): $1.29 at Card Kingdom, near mint, their price list as of .
Padeem, Consul of Innovation 
Legendary Creature — Vedalken Artificer · 1/4 · Rare · Kaladesh Promos · #59p
Artifacts you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)
At the beginning of your upkeep, if you control the artifact with the greatest mana value or tied for the greatest mana value, draw a card.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
7 printings · $1.29 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War Commander | 91 | Rare | $2.99 | — |
| Commander Masters | 109 | Uncommon | $2.29 | $3.99 |
| Foundations Commander | 71 | Uncommon | $1.29 | — |
| Foundations Jumpstart | 62 | Rare | $2.29 | — |
| Kaladesh | 59 | Rare | $2.49 | $7.99 |
| Kaladesh Promos | 59p | Rare | $9.99 | $14.99 |
| Kaladesh Promos | 59s | Rare | — | $6.99 |
4 rulings from Wizards of the Coast
- 20 September 2016If you no longer control an artifact with the highest mana value as Padeem's triggered ability resolves, you don't draw a card.
- 20 September 2016The artifact you control has to have the highest mana value only among artifacts on the battlefield, not among all permanents on the battlefield.
- 20 September 2016If you don't control an artifact with the highest mana value as your upkeep begins, Padeem's second ability won't trigger. You can't cast an instant to destroy an opponent's artifact during your turn before your upkeep begins.
- 20 September 2016If an artifact has {X} in its mana cost, X is considered to be 0.