Evolution of original Grixis Dredge deck played for GRN standard. Original deck used a few more kickstart cards to self-mill as many cards as possible to trigger Creeping Chills, Narcomoebas as they are put into the graveyard and get Arclight Phoenixes in there too so they can come back in force by pplaying three spells. GRN version also played Wand of Vertebrae for extra mill. ELD version as played by Kanister at Fandom legends is essentially Mono-Blue and not expecting to play Phoenix or Dispersal half of Discovery. Merfolk Secretkeeper repalces Wand and sideboard gains an alternate win condition with Jace, Wielder of Mysteries allowing you to mill yourself out to win.
The deck crushes the Golos Field decks currently Tier 1 in standard. Assuming Field of the Dead is banned on Oct 21, this will probably need to add red and/or black back in.