Cheapest priced copy (Strixhaven: School of Mages Promos): $0.49 at Card Kingdom, foil, near mint, their price list as of .
Kianne, Dean of Substance // Imbraham, Dean of Theory 
Legendary Creature — Elf Druid // Legendary Creature — Bird Wizard · 2/2 · Rare · Strixhaven: School of Mages · #326
{T}: Exile the top card of your library. If it's a land card, put it into your hand. Otherwise, put a study counter on it.
{4}{G}: Create a 0/0 green and blue Fractal creature token. Put a +1/+1 counter on it for each different mana value among nonland cards you own in exile with study counters on them.
Flying
{X}{U}{U}, {T}: Exile the top X cards of your library and put a study counter on each of them. Then you may put a card you own in exile with a study counter on it into your hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $0.59 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages Promos | 152s | Rare | — | $0.49 |
| Strixhaven: School of Mages | 152 | Rare | $0.49 | $0.49 |
| Strixhaven: School of Mages | 326 | Rare | $0.59 | $0.49 |
4 rulings from Wizards of the Coast
- 16 April 2021You may choose 0 as the value of X as you activate Imbraham’s last ability. If you do, you will not exile any cards from your library. However, you may still put a card previously exiled with a study counter on it into your hand.
- 16 April 2021The second abilities of both Kianne and Imbraham look at all cards you own in exile with study counters, even if they were exiled by a different permanent, such as another Kianne or Imbraham.
- 16 April 2021Cards are exiled face up unless an effect states otherwise.
- 16 April 2021Exiled cards with study counters on them retain their study counters even if Kianne or Imbraham leave the battlefield.