The end-of-turn phase didn't exist as we know it when these cards were printed
Cards Against Humanity: Family Edition is much the same as the original card game, with players choosing white card answers to fill the blanks in black card prompts
For this reason, it is called the Exdeath Dojo among fans and is gaining cult popularity under the nickname Sensei . Later, other dojos were discovered and Exdeath's evaluation was studied and raised considerably, but the nickname "Sensei" still persists
This means you can hold up mana during an opponent's turn for removal, interaction, or whatever else they might throw your way
It is much easier to get a sense of things and put your decks together
Meanwhile, the 1 can combo with Felidar Guardian, but you need an extra piece for this combo to actually do anything (something like Altar of the Brood to take advantage of infinite enters-the-battlefield triggers)