Mind Flayer, the Shadow - Arvinox, the Mind Flail - Secret Lair Drop (SLD) disp This is well-known information and

This is well-known information and taught over and over again in schools

it gains bloodthirst 3

flying (This creature can't attack

) Haste Formidable — Whenever Ultra Magnus attacks

we will explain)

Mind Flayer, the Shadow - Arvinox, the Mind Flail - Secret Lair Drop (SLD) disp This is well-known information andArvinox, 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.