With The Scarab God, the control player could just leave up mana before dumping any that was unused into making Zombies with the God
Azor's Elocutors takes a few turns to get rolling, but there are plenty of ways to speed that up
The ability to negate sacrifice effects, such as Dictate of Erebos, is truly a blessing, but it can be a curse if you arent careful Torment of Hailfire will still force you to discard cards or lose life, so watch out
When I started cataloging my Magic collection, I started with my Black section (the smallest), and quickly discovered that if I was to have a complete catalog, I had to list all the sets that my cards were from, as well as the number of each card I had, the condition it was in, etc
returning something to the battlefield gives it combo potential
You can tap Hazel and pay two life to tap a bunch of untapped tokens you control, adding mana in any combination equal to the number of tokens you tapped