From being able to switch your opponents' Pokemon to getting specific cards from your deck, Supporter cards are necessary for speeding up your setup and making your deck work
It's such a powerful card that people often talk about it needing to be discussed at the table before a game
Commander also gives you the option to throw a bunch of good stuff cards into a pile, add in some mana fixing and table interaction, and just have it work
Being a taskmage, she's only interested in one object set
The Rules Reference guide is full of all the basic rules, card layouts, and a very helpful glossary full of terms players will come across and use when playing the game
Most Voltron decks have the weakness of all their eggs going on their commander, but the card advantage Kotis generates patches that weakness fairly well