There's no extra bonus if you control more than one commander
Its generally good practice to limit yourself to exactly 60 cards
Each player chooses 2 of their characters and puts them into their inkwell facedown and exerted
Source: TCGplayer Main Genre Fantasy Release Date August 5, 1993 Created by Richard Garfield Video Game(s) Magic: The Gathering, Magic the Gathering Commander, Magic: The Gathering - Battlegrounds, Magic the Gathering: Duels of the Planeswalkers 2012, Magic: The Gathering - Duels of the Planeswalkers, Magic: The Gathering Duels of the Planeswalkers 2012, Magic: The Gathering Duels of the Planeswalkers 2013, Magic: The Gathering Duels of the Planeswalkers 2014, Magic: The Gathering Arena Character(s) Jace Beleren, Chandra Nalaar, Liliana Vess, Garruk Wildspeaker, Nissa Revane, Ajani Goldmane, Nicol Bolas, Teferi, Gideon Jura, Sorin Markov, Ral Zarek
Right now, you can buy the bundles as part of a limited time deal for just $190, or less than $50 per deck
This includes the very same action card he can fetch from the discard pile