Cheapest priced copy (Ravnica Allegiance): $2.99 at Card Kingdom, foil, near mint, their price list as of .
The Haunt of Hightower 
Legendary Creature — Vampire · 3/3 · Mythic · The List · #RNA-273
Flying, lifelink
Whenever The Haunt of Hightower attacks, defending player discards a card.
Whenever a card is put into an opponent's graveyard from anywhere, put a +1/+1 counter on The Haunt of Hightower.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $2.99 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The List | RNA-273 | Mythic | $3.49 | — |
| Ravnica Allegiance | 273 | Mythic | — | $2.99 |
2 rulings from Wizards of the Coast
- 25 January 2019The Haunt of Hightower's last ability won't trigger when a token is put into an opponent's graveyard.
- 25 January 2019If The Haunt of Hightower is attacking a planeswalker, the controller of the planeswalker is the defending player.