One method would be to animate a Cascading Cataracts and pump some of that delicious magical energy into a Malachite Talisman with each spell you cast to keep your chain going
In a Two-Headed Giant game, Insatiable Hemophage's last ability causes the opposing team to lose life equal to twice the value of X and you to gain X life
#5 Perhaps you might share your list with us so that we can all see the correct way to provide the correct density of disposable artifact sacrifice targets and fair tutor targets
Command Tower is one of the most reprinted lands of all time, as its simple ability to be tapped for any mana color your deck has is useful in every Commander deck
It's also legal in several formats including Commander, Legacy, Modern, and Vintage
Your creatures will be faster, stronger, and more burdensome for your opponent if you can create ways to get to 5 mana quickly