Unlike firebending cards, you retain the mana so you can throw a Yargle under the bus to get out a Crackle with Power, or you can pour mana into Ozai's activated ability, which interacts with cast-from-exile synergies
A Life Wheel Tray is available optional
Courser was so good you would play it in aggro decks despite how defensive of a card it it
So typically, youd see 90 out of every 101 commons mathematically in a Set Booster box
Enchantments There is a pretty sizeable pool of one black mana, when this creature dies, it doesnt die/returns to the field, both on enchantments and on instants, so Im not going to talk about those right now
As the world's jankiest brewers online have pointed out, you can also build a giant mutate stack, clone its effect with Deadpool, then find a way to bounce it back to hand and replay all the mutate creatures onto Deadpool (who is a mutant, not a human) for double the triggers