FOILCheapest priced copy (The List): $1.49 at Card Kingdom, near mint, their price list as of .
Chainer, Nightmare Adept 
Legendary Creature — Human Minion · 3/2 · Mythic · Commander 2019 · #39
Discard a card: You may cast a creature spell from your graveyard this turn. Activate only once each turn.
Whenever a nontoken creature you control enters, if you didn't cast it from your hand, it gains haste until your next turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $1.49 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2019 | 39 | Mythic | — | $1.79 |
| Modern Horizons 2 | 289 | Rare | $1.99 | $3.49 |
| Modern Horizons 2 | 419 | Rare | $2.29 | $2.99 |
| The List | MH2-289 | Rare | $1.49 | — |
5 rulings from Wizards of the Coast
- 23 August 2019If you somehow activate Chainer's first ability more than once during a turn (perhaps because Chainer left the battlefield and returned), you can cast a creature card for each ability's permission. Similarly, if another effect allows you to cast a creature card from your graveyard, you may use that permission and later use Chainer's permission to cast another creature card.
- 23 August 2019You don't choose a creature card to cast while activating or resolving Chainer's first ability. The ability creates a permission for you to cast a creature card from your graveyard later in the turn.
- 23 August 2019Chainer's last ability triggers if Chainer enters the battlefield without being cast from your hand.
- 23 August 2019Chainer's first ability doesn't change when you can cast the creature card. You can normally only cast it during your turn while the stack is empty, but if the creature card has flash, you can cast it at other times.
- 23 August 2019Chainer's last ability triggers if the entering creature was cast from a zone other than your hand, or if it wasn't cast at all and is entering the battlefield from anywhere (including from your hand).