Bryce, Unrivaled Student

When Bryce, Unrivaled Student enters the battlefield, scry 2 then draw 2
{1}{u}{u}: Counter target spell
{x}{u}{b}: Destroy target creature with converted
mana cost X and create as many 2/2 zombies
as half of destroyed creatures toughness rounded
down to a minimum of 1
If there are 5 or more creatures in combined graveyards, Flip Bryce, Unrivaled Student
at the next end step