Price$0.10
Buy on TCGplayerSkyrider Patrol’s triggered ability goes on the stack without a target. While that ability is resolving, you may pay 
. If you do, a second ability triggers and you pick a target creature. This is different from abilities that say “If you do . . .” in that players may cast spells and activate abilities after mana is paid but before the target receives a counter and flying.
While resolving the triggered ability of Skyrider Patrol, you can’t pay multiple times to give more than one +1/+1 counter.
. When you do, put a +1/+1 counter on another target creature you control, and that creature gains flying until end of turn.