yugioh online deck simulator The Only Good Yu-Gi-Oh! Simulator? Kingdom Duels

The trick to the commander is that when it is removed from the battlefield in any way it is placed back in its commander zone so you can cast it again, but with an added mana cost

This is mostly considering how many other meta-defining cards the deck has that utilize Dragon-Types in a more useful and damaging way

Commander decks also have a commander that is in the command zone that you can cast whenever it is legal to play a creatuer

Things get even better when you combine Cathar's Crusade with spells that cause multiple creatures to enter at the same time , like Entreat the Angels of Hop To It

By fast mana, I mean methods to get ahead of the curve early in the game, most likely on turn 1