They copy themselves for each spell cast before it, so it's possible to cast enough spells to burn all your opponents with Grapeshot, or mill them all with Brain Freeze if you're able to cast a ton of spells in one turn (made easier with the Hullbreaker Horror combo)
Emblems are incredibly powerful in Magic: The Gathering , since there are no cards that interact with them , so you'll have this ability until the end of the game
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Noctis, Prince of Lucis: You pay all costs and follow all timing rules for artifact spells cast with the permission granted by Noctis's last ability
VI also introduces summons, creatures that fight for the player for a limited time
Before wrapping up everything, I want to highlight something anyone ranting about MTG should say: do not buy packs for long term investment