Owlborne Calvary

Flying, hexproof
Whenever Owlborne Cavalry attacks, other flying creatures you control get +1/+1 and you
may pay {w}{u}. If you do, detain target creature
an opponent controls.
"People think I am her rider. The truth is, I'm just
a passenger. I am there to protect her, so she can
lead our forces to victory."
- Aenea, Azorius Owlrider