(Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Whenever one or more other creatures you control enter, if they entered or were cast from a graveyard, create a token that's a copy of one of them
9.5/10$1.78 Druid Class Enchantment Class (Gain the next level as a sorcery to add its ability.) Landfall Whenever a land you control enters, you gain 1 life
Mill Decks can also take the form of forcing the opponent to discard cards from their deck repeatedly as well
While the ability to deal a maximum of 160 damage for only a single energy card is undeniably pretty sweet, the cost of needing to have a bench full of fossils to reach that benchmark can't be easily swept aside, particularly because the attack loses power when those fossils evolve into actual usable Pokmon
What makes Atlanteans so cool is that their second effects trigger when sent to the GY to activate a WATER monsters effect, so if you send Atlantean Dragoons , you get to tutor any Sea Serpent monster while also getting another Atlantean monster to hand