Mind Flayer, the Shadow - Arvinox, the Mind Flail - [Foil] Secret Lair Drop (SLD) FUT Whenever a nontoken creature enters

Whenever a nontoken creature enters the battlefield

creatures can't block unless their controller pays {1} for each of those creatures

you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying

one more sinister than the last

Mind Flayer, the Shadow - Arvinox, the Mind Flail - [Foil] Secret Lair Drop (SLD) FUT Whenever a nontoken creature entersArvinox, the Mind Flail isn't a creature unless you control three or more permanents you don't own. At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells.