Shrieking Coffin

[Polingkr]

Shrieking Coffin 62 cards, 0 sideboard 10 {Swamp} 10 {Island} 2 {Dismal Backwater} 22 lands 4 {Mindshrieker} 4 {Coffin Queen} 2 {Deadeye Navigator} 4 {Baleful Strix} 2 {Dimir Guildmage} 4 {Shriekmaw} 2 {Draining Whelk} 22 creatures 4 {Memory Lapse} 2 {Lightning Greaves} 4 {Training Grounds} 4 {Brainstorm} 4 {Despise} 18 other spells

Note: I'm newish to mtg, but this control deck I built seems solid to me and I'd like feedback before I buy cards for it. Thoughts/suggestions/concerns?

[Thefluffymacheen]

 {Duskmantle Guildmage} seems like it has more potential than  {Dimir Guildmage} seeing as it can hurt the opponent with  {Mindshrieker}'s activated ability.