Cheapest priced copy (Lorwyn Eclipsed): $0.49 at Card Kingdom, near mint, their price list as of .
Disruptor of Currents 
Creature — Merfolk Wizard · 3/3 · Rare · Lorwyn Eclipsed · #303
Flash
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
When this creature enters, return up to one other target nonland permanent to its owner's hand.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn Eclipsed | 47 | Rare | $0.49 | $0.49 |
| Lorwyn Eclipsed | 303 | Rare | $0.49 | $0.79 |
| Lorwyn Eclipsed Promos | 47p | Rare | $0.49 | $0.99 |
4 rulings from Wizards of the Coast
- 17 November 2025If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.
- 17 November 2025When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.
- 17 November 2025You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.
- 17 November 2025Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.