Cheapest priced copy (Ikoria: Lair of Behemoths): $0.49 at Card Kingdom, near mint, their price list as of .
Frondland Felidar 
Creature — Cat Beast · 3/5 · Rare · Ikoria: Lair of Behemoths · #186
Vigilance
Creatures you control with vigilance have "{1}, {T}: Tap target creature."
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $0.59 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ikoria: Lair of Behemoths | 186 | Rare | $0.49 | $0.49 |
| Ikoria: Lair of Behemoths | 334 | Rare | $0.49 | $0.49 |
| Ikoria: Lair of Behemoths Promos | 186p | Rare | $0.49 | $0.49 |
| Ikoria: Lair of Behemoths Promos | 186s | Rare | — | $0.59 |
4 rulings from Wizards of the Coast
- 17 April 2020Once you’ve activated the ability granted by Frondland Felidar, causing the creature to lose that ability (such as by removing Frondland Felidar from the battlefield) won’t affect the ability on the stack.
- 17 April 2020Frondland Felidar’s last ability applies to itself as long as it still has vigilance.
- 17 April 2020You can activate the ability granted by Frondland Felidar after attacking but before blockers are chosen.
- 17 April 2020Tapping an attacking creature doesn’t remove it from combat.