all mill cards mtg A Guide to Self-Mill in Commander — PlayEDH The 43 Best Mill Cards

While eight mana is a bit much to pay for Astral Dragons admittedly powerful enters-the-battlefield ability and its middling 4/4 body, getting the same ability and stats on for just three mana (with Hashaton) is an absolute steal

Any effect which can put a creature card into our graveyard can keep Sefris counting down towards her next reanimation

But I will get back to the potential practical implications of this in a bit

Chief among them are the Jund Roots and Golgari Roots decks, which can flood the battlefield with Plant tokens

We'd expect a jump scare closer to Halloween

Legality depends on the tournament format -- Plot Card can be legal in some formats and banned or restricted in others