Plus its immediate removal at the beginning of your opponents upkeep, plus the value youll get returning a creature card from your graveyard every turn
You can spend four generic mana to scry one and reveal the top card of your deck
Hitting our next spot is another Doctor, Time Lord for this and then Blue too
The combo can be executed with only a few cards, which makes it quite simple as well: Cast Venture Deeper , targeting your opponent Cast Merfolk Secretkeeper from adventure zone Cast Ashnods Altar Cast Chromatic Orrery to turn colorless mana into blue mana Cast Lier, Disciple of the Drowned from the commander zone Sacrifice Merfolk Secretkeeper , using Ashnods Altar Cast Venture Deeper from graveyard, using Liers ability Repeat this cycle infinitely until your opponent mills all their cards in a single turn using the mana produced by Ashnods Altar and Chromatic Orrery
The goal of this deck is to kill our opponents with poison counters while controlling the board with tons of interaction and misdirection, including blowing up all their permanents with Dralnu
However, this can be counteracted with Bello, Bard of the Brambles