These cards can fit within the same power-band, but they arent necessarily required in a cube list for the archetype to work
Prismari Artistry (blue-red) Blue/Red Commander: Rootha, Strategy: Cast powerful and expensive spells, while also creating massive Elementals with each cast
Perhaps more importantly than their gameplay ramifications, each card is showing off the Phyrexian invasion of a different plane that may or may not show up elsewhere in the set
12 Tolarian Academy Banned in Legacy & Commander, Restricted in Vintage In the Magic lore, Tolaria was an advanced magic school run by the legendary planeswalker Urza
Much like Omniscience, Hive Mind opens the door for you to win the game the same turn you cast Show and Tell
Ironically, that fair mode of Reanimate drives home how unfair this card really is at one mana