Devices such as other computers, consoles, smartphones, tablets, and others could consume your network's resources
You cannot make your opponent say anything that would be considered inappropriate for the venue you are playing
Baral, Chief of Compliance is another two-drop that importantly survives Shock and is good enough that its important to play four copies, as the first one that you cast will have a huge target on its head
For example, if you control The Ozolith ("Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.") when Zack Fair's last ability resolves, you'll put the appropriate number of each kind of counter onto both The Ozolith and the target creature.
Utilizing life and creatures as resources, black can outpace opponents in card advantage, turning the tide of the game by sheer volume of options available each turn