Cheapest priced copy (Double Masters 2022): $0.49 at Card Kingdom, near mint, their price list as of .
Abbot of Keral Keep 
Creature — Human Monk · 2/1 · Rare · Magic Origins · #127
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When this creature enters, exile the top card of your library. Until end of turn, you may play that card.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 100 | Rare | $0.49 | $0.49 |
| Double Masters 2022 | 446 | Rare | — | — |
| Magic Origins | 127 | Rare | $0.49 | $0.49 |
| Magic Origins Promos | 127s | Rare | — | $1.49 |
8 rulings from Wizards of the Coast
- 22 June 2015Once it triggers, prowess isn't connected to the spell that caused it to trigger. If that spell is countered, prowess will still resolve.
- 22 June 2015Unless an effect allows you to play additional lands that turn, you can play a land card exiled with Abbot of Keral Keep's ability only if you haven't played a land yet that turn.
- 22 June 2015Any spell you cast that doesn't have the type creature will cause prowess to trigger. If a spell has multiple types, and one of those types is creature (such as an artifact creature), casting it won't cause prowess to trigger. Playing a land also won't cause prowess to trigger.
- 22 June 2015If you don't play the card, it will remain exiled.
- 22 June 2015Prowess goes on the stack on top of the spell that caused it to trigger. It will resolve before that spell.
- 22 June 2015The card exiled by Abbot of Keral Keep's ability is exiled face up.
- 22 June 2015Playing the card exiled with Abbot of Keral Keep's ability follows the normal rules for playing that card. You must pay its costs, and you must follow all applicable timing rules. For example, if the card is a creature card, you can cast that card by paying its mana cost only during your main phase while the stack is empty.
- 22 June 2015You may play that card that turn even if Abbot of Keral Keep is no longer on the battlefield or under your control.