EE3
Creature Aquatic/Shark
Suggested rarity: uncommon
2/4/3/3/0

Spawns in ocean. Bloodscent: Ocean (any creature in contiguous water is revealed).

"You're gonna need a bigger boat..."

Other bloodscent card ideas:

Wild Dogs
Creature Dogs
DD4
Suggested rarity: uncommon
3/3/5/3/0
Bloodscent: Plains/Hills. (reveal all creatures in contiguous land type) If Wild Dogs is attacked, dim Wild Dogs.

"Their calls are often heard at night. Keep the young ones locked up tight."

(I do not intend for this to include forested hills.)

Alpha Wolf
Creature Wolf
SS3
Suggested Rarity: Rare
2/3/4/3/0
Bloodscent: All Forests. (reveal all creatures in contiguous land type). Foreststride.
"Few creatures stride so confidently through the wood."

Muckmonster
Creature: Demon
D2
Suggested Rarity: Uncommon
1/2/2/3/0
Bloodscent: Any creature not at full health. (reveal all creatures not at full health). If Murkmonster starts the round on a Swamp, Heal 1.

"I don't understand how it smells ANYTHING covered in that stuff."

Aerial Defense Network
Building
XX6
Suggested Rarity: Rare
2/5/0/1/3
Bloodscent: Aloft creatures. May only attack aloft creatures.

"Contact bearing 1,2,7. Thistle Falcon identified. Target acquired, fire at will!"

Despite the fact that I often play aloft creatures, I am totally drooling over the Aerial Defense Network idea. Maybe it should be uncommon.

*drools...*