if I recall correctly, airborne creatures survive flood.
You recall incorrectly.
In the game yes but in real life, I believe birds survive floods.
Every video game must have video game logic. Shut up
As for the card, waayy underpowered. I'd suggest lowering the cost a bit and not having the ability be bound to only targeting creatures in flooded areas. Maybe not having the ability to be bound to flooding in any way at all.
(If it seems OP after all that, maybe up the ability cost,)
Would it be too similar to flying Eagle's Eye if my suggestions were applied?