If you played without any ones or twos, you could guarantee your cascades always hit a Hypergenesis, which, despite having no cost, counts as zero cost for cascade
The Support keyword allows that character to lend their strength to another, increasing your overall damage output for the turn
That said, it might be the worst of the bunch, as its only really creature removal on a stick
Casting from the top of the Library effectively adds to your hand, and by tapping two Creatures of any power level and paying a single green mana, Eladamri can put a potentially huge threat onto the field without paying its regular casting cost
The Elder Dragon is played in a variety of Commander decks, like the other Elder Dragons, and is the least valuable dragon from the CLB cycle
It has expanded with other heroic-like abilities that trigger when you target your own stuff, but Zada has always been an explosive option