You'll be slinging spells, sure, but Rootha creates flying Elementals with Haste and power/toughness equal to the highest mana value spell you cast in your first main phase
It can be OK as a cheap mini wrath for a control player who can get some use out of the other ability with tokens etc but at that it is not worth a cube slot, certainly not a gold one
Or you can play her at the beginning of your turn to make a big play as pseudo-removal that helps you protect your team while taking out enemy characters
When its wings spread wide, it absorbs the life energy of everything around it, signaling the end of a cycle
Hidden Fates took the Pokmon TCG world by storm with its massive Shiny Vault subset and powerful GX cards, quickly becoming one of the most beloved modern sets
The move "Aura Storm" is the offensive core of the Lucario deck