As flavorful as these three legends are, they share a similar issue
First off, the primary use of Fireball has always been to hit a single target for a huge amount of damage, a task at which Meteor Shower fails completely
This way, instead of getting counters on an artifact that you have to tap for mana, instead, for each Pentad Prism you control with a counter on it, you get one mana every time you cast a noncreature spell for each Flux Channeler you control
These reverse holos have a tendency to discolor when using the pen
You can turbo it out even harder if you can manage some inter-college collaboration with Prismari and their Treasure synergies
Once per turn, you can remove 3 Kaiju Counter on the field to prevent your opponent from activating cards or effect this turn, and allow this monster to attack monsters 3 times that turn