heres the deck list any suggestion and coment r greatly appeicated

Lands:20
tainted isle (4)
lonely sandbar(1)
barren moor (1)
island(7)
swamp(7)

Black:24
Duress(4)
hollow specter(2)
innocent blood(4)
megrim(4)
mind burst(4)
skull fracture(4)
tombfire(2)

Blue:14
careful study(4)
Compulsion(2)
Counterspell(4)
Grip of amnesia(2)
temporal adept(2)

Aritfacts:2
Ensnaring bridge(2)

my sideboard sucks so im not listing it lol plz make some suggetions lol

this deck has a 50/50 chance of beating mirias wake which is slow but very strong me 2 him 2 i only lost when i got ether alot of mana or no mana which im kinda luck on usally:cool: