I had to really resist the urge to give a slot to Meddling Mage, while it has not been in my cube for a good while now I am very fond of the card and thought it added a lot to cube even if it wasn't optimal
It ramps from smaller Eldrazi creatures into monsters that destroy opponents
+1: Create a token that's a copy of target creature you control, except it has haste and "At the beginning of the end step, sacrifice this token." 4: Chandra deals 8 damage divided as you choose among any number of target creatures and/or planeswalkers
For you devoted 61-plus players: yes, there are examples of success you can point to
First of all, this card costs X less to play, where X is the greatest power among creatures you control, meaning itll never cost eight mana
Another energy ritual, Motherlode, Excavator will usually give you about four to eight energy on average, when played in the late game