Cheapest priced copy (Lorwyn Eclipsed): $0.35 at Card Kingdom, near mint, their price list as of .
Silvergill Mentor 
Creature — Merfolk Wizard · 2/1 · Uncommon · Lorwyn Eclipsed · #69
As an additional cost to cast this spell, behold a Merfolk or pay {2}. (To behold a Merfolk, choose a Merfolk you control or reveal a Merfolk card from your hand.)
When this creature enters, create a 1/1 white and blue Merfolk creature token.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn Eclipsed | 69 | Uncommon | $0.35 | $0.49 |
| Lorwyn Eclipsed | 403 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 17 November 2025If an effect refers to a "[subtype] card," it refers only to a card that has that subtype. For example, Glen Elendra's Answer creates a Faerie token and features a Faerie in its art, but it isn't a Faerie card.
- 17 November 2025If a card in your hand is already revealed (perhaps because it was revealed to pay a cost of a spell that's still on the stack or due to the effect of a card like Telepathy), you may reveal it again to pay the cost of another spell or ability that requires you to reveal a card from your hand.
- 17 November 2025If a cost to cast a spell includes revealing a card, that card remains revealed from the time the spell is announced until the time it leaves the stack.