H: mono black devotion W: shocks

I have for trade:
4 Desecration demons
4 Night veil specters
3 underworld connections
4 pack rats
1 hero's downfall
1 mutavault

What I want for this:
4 breeding pools
3 steam vents
4 overgrown tomb
4 godless shrines
(Any combination of this, please try to keep trades above 20 in value)