Cheapest priced copy (Dominaria United): $0.49 at Card Kingdom, near mint, their price list as of .
Tyrannical Pitlord 
Creature — Demon · 6/6 · Rare · Dominaria United · #425
Flying, trample
As this creature enters, choose another creature you control.
The chosen creature gets +3/+3 and has flying.
When this creature leaves the battlefield, sacrifice the chosen creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 284 | Rare | $0.49 | $0.49 |
| Dominaria United | 425 | Rare | $0.49 | — |
5 rulings from Wizards of the Coast
- 9 September 2022If another player gains control of the chosen creature while Tyrannical Pitlord is still on the battlefield, that creature will continue to have flying and get +3/+3.
- 9 September 2022If the chosen creature leaves the battlefield, you can’t choose a new creature.
- 9 September 2022If Tyrannical Pitlord enters the battlefield at the same time as another creature, that creature can’t be chosen.
- 9 September 2022The ability of Tyrannical Pitlord that allows you to choose a creature isn’t a triggered ability and doesn’t use the stack. Players can’t respond to your choice of which creature it’s affecting.
- 9 September 2022If Tyrannical Pitlord’s leaves-the-battlefield triggered ability resolves while its controller is not the same as the controller of the chosen creature, that creature will not be sacrificed.