Cheapest priced copy (Innistrad: Double Feature): $0.35 at Card Kingdom, near mint, their price list as of .
Voltaic Visionary // Volt-Charged Berserker 
Creature — Human Wizard // Creature — Human Berserker · 3/1 · Uncommon · Innistrad: Crimson Vow · #183
{T}: This creature deals 2 damage to you. Exile the top card of your library. You may play that card this turn. Activate only as a sorcery.
When you play a card exiled with this creature, transform this creature.
This creature can't block.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 450 | Uncommon | $0.35 | $0.49 |
| Innistrad: Crimson Vow | 183 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 19 November 2021Playing a card this way follows all the normal timing rules for that card. For example, if you play a land this way, you may do so only during your main phase while the stack is empty and only if you haven't yet played a land (unless another effect allows you to play additional lands).
- 19 November 2021When you play a spell exiled this way, Voltaic Visionary will transform before that spell resolves.
- 19 November 2021If Voltaic Visionary transforms into Volt-Charged Berserker after it has been declared as a blocker, it will not be removed from combat and is still blocking.