Two Energy to draw a card is great
All of these, and many more, are fine reasons to purchase a booster box, even a low-EV booster box
It generates mana strictly for activations, giving you more chances to fire off impactful effects from cards that tap, sacrifice, or trigger on demand
For example, you could put Boggart Shenanigans onto the battlefield with this effect
Creature - Knight Angel Calamity, Galloping Inferno Haste Whenever Calamity attacks while saddled, choose a nonlegendary creature that saddled it this turn and create a tapped and attacking token that's a copy of it
Single Card Examinations Archive Trap and Hedron Crab will always be linked together for me, both coming out of Zendikar and cementing their legacies in the mill deck I had built for early Worldwake Standard