Mill?

Deck
4 Merfolk Secretkeeper (ELD) 53
14 Island (ANA) 4
4 Lucky Clover (ELD) 226
4 Drowned Secrets (GRN) 39
2 Brineborn Cutthroat (M20) 50
2 Essence Capture (RNA) 37
4 Quench (RNA) 48
4 Thought Collapse (RNA) 57
2 Brazen Borrower (ELD) 39
2 Overwhelmed Apprentice (ELD) 60
4 Unsummon (M20) 78
2 Sage's Row Denizen (M20) 73
2 Murmuring Mystic (GRN) 45
2 Portal of Sanctuary (M20) 71
1 Ashiok, Dream Render (WAR) 228
1 Folio of Fancies (ELD) 46
4 Mystic Sanctuary (ELD) 247
2 Castle Vantress (ELD) 242

Sideboard
4 Negate (RIX) 44
2 Brazen Borrower (ELD) 39
4 Spectral Sailor (M20) 76
1 Cavalier of Gales (M20) 52
2 Brineborn Cutthroat (M20) 50
2 Sage's Row Denizen (M20) 73