In other words, your opponent shuffles their hand into their deck and draws four cards after you discard something
This doesnt just apply to the lowest Evolutions of Pokemon, but EX Pokemon as well, since they are also considered Basic in many cases
Its ability will continue to affect other Sliver creatures.

SIDEBOARD GUIDE MONO GREEN: Out: 1xCling to Dust, 2xCensor, 1xKaya, Orzhov Usurper, 3xWandering Emperor 1xSupreme Verdict In: 3xAether Gust, 3xThoughtseize, 1xDovins Veto, 1xGo Blank On the draw: -2 Power Word Kill, +2 Portable Hole BR MIDRANGE: Out: 1xKaya, Orzhov Usurper, 2xAbsorb, 1xBloodchiefs Thirst, 1xSupreme Verdict, 1xPlains In: 3xAether Gust, 3xGo Blank UW CONTROL: Out: 4xFatal Push, 2xPower Word Kill, 3xSupreme Verdict In: 2xMalevolent Hermit, 3xGo Blank, 3xThoughtseize, 1xDovins Veto IZZET PHOENIX: Out: 1xBloodchiefs Thirst, 1xFatal push, 3xSupreme Verdict, 4xThe Wandering Emperor In: 2xMalevolent Hermit, 3xGo Blank, 3xThoughtseize, 1xDovins Veto SPRITS: Out: 1xCling to Dust, 2xDovins Veto, 2xAbsorb, 1xKaya, Orzhov Usurper, 1xTeferi, Hero of Dominaria In: 2xMalevolent Hermit, 2xPortable Hole, 3xThoughtseize RW HEROIC: Out: 1xCling to Dust, 4xAbsorb, 2xCensor, 1xMemory Deluge In: 3xAether gust, 3xThoughtseize, 2xPortable Hole Well thats it for me, folks

Now, Fractured Realm is where things get spicy
Whenever a creature token you control leaves the battlefield, draw a card if it was attacking