FOILCheapest priced copy (Murders at Karlov Manor): $0.99 at Card Kingdom, near mint, their price list as of .
Kylox's Voltstrider 
Artifact — Vehicle · 4/4 · Mythic · Murders at Karlov Manor Promos · #215s
Collect evidence 6: This Vehicle becomes an artifact creature until end of turn.
Whenever this Vehicle attacks, you may cast an instant or sorcery spell from among cards exiled with it. If that spell would be put into a graveyard, put it on the bottom of its owner's library instead.
Crew 2
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Murders at Karlov Manor | 215 | Mythic | $0.99 | $0.99 |
| Murders at Karlov Manor | 417 | Mythic | — | $0.99 |
| Murders at Karlov Manor Promos | 215p | Mythic | $0.99 | $0.99 |
| Murders at Karlov Manor Promos | 215s | Mythic | — | $0.99 |
3 rulings from Wizards of the Coast
- 2 February 2024Once you've announced that you're casting a spell, players can't take actions until you've finished doing so. Notably, opponents can't try to remove cards from your graveyard to stop you from collecting evidence.
- 2 February 2024If you can't exile enough cards to meet or exceed the required mana value, you can't choose to collect evidence at all.
- 2 February 2024You choose whether or not to cast a spell from among the exiled cards as Kylox's Voltstrider's triggered ability resolves. If you do, you do so as part of the resolution of that ability. You can't wait to cast it later in the turn. Timing restrictions based on the card's type are ignored.