Lofty Denial
Instant
Counter target spell unless its controller pays . If you control a creature with [[ keyword: "flying" ]], counter that spell unless its controller pays 
instead.
The mage scowled as yet another bolt splashed harmlessly against seemingly empty air.
Manuel Castañón
Core Set 2021 (M21)
• #56Rulings
If you control more than one creature with flying, Lofty Denial still requires only {4}.
(wotc • 2020-06-23)
Rulings
If you control more than one creature with flying, Lofty Denial still requires only {4}.
(wotc • 2020-06-23)