Cheapest priced copy (Ixalan): $0.35 at Card Kingdom, near mint, their price list as of .
Deathless Ancient 
Creature — Vampire Knight · 4/4 · Uncommon · Ixalan · #100
Flying
Tap three untapped Vampires you control: Return this card from your graveyard to your hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ixalan | 100 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 29 September 2017Deathless Ancient's last ability can be activated only while it's in your graveyard.
- 29 September 2017To activate the last ability, you may tap any untapped Vampires you control, including ones you haven't controlled continuously since the beginning of your most recent turn. (Note that tapping the creature doesn't use {T} [the tap symbol].)
- 29 September 2017Once you announce that you're activating Deathless Ancient's last ability, no player may take other actions until the ability's been paid for. Notably, players can't try to stop the ability by tapping or removing Vampires you control.