mill 13 cards mtg Magic The Gathering call upon classic summons BLUE MILL - Mindshrieker -

It also blanks indestructible, so depending on the current meta, this card can see a lot of Standard play, at least

Defender, flying When this creature enters, if you revealed a Dragon card or controlled a Dragon as you cast this spell, draw a card

The important line is at the bottom there, the third ability: 4, T: Copy target permanent spell you control (the copy becomes a token.) This might not be new new rules it might be that this was a lurking clause in the comprehensive rules at some point, not brought forward or presented obviously in some rules card or whatever

Besides crushing Burn, Collective Brutality also helps against Collected Company decks by taking out a mana creature and the Collected Company in their hand