milling cards mtg Is a card that causes opponents to mill considered a mill spell? How to counter self mill

Kenrith, the Returned King (as well as Golos pre-ban) helped bring this strategy to the main stage, so much that its one of the most popular commanders in the format

8Plains

8 Mana Drain Banned in Legacy, Legal in Vintage & Commander The set Legends isn't known for offering many powerful cards to the Magic library

Since Yanniks ability triggers on ETB, you can lean into blink effects like Ephemerate and Conjurer's Closet, while at the same time using Cathars' Crusade to put more counters on your creatures whenever Yannik enters and leaves

Blue's milling tends to come in two mechanical parts: spells that mill numerous cards once, and permanents, most often creatures, that can repeatedly mill smaller amounts of cards