As a Commander, the robot side Blitzwing, Cruel Tormentor makes more sense since it has a nice triggered ability of making an opponent lose double the life lost that turn
Everything about this card is pretty good, it has an average hp, low retreat cost, two very good moves
Annihilator is a creature-based mechanic from Rise of the Eldrazi, and appears on the titular extra-planar monsters
I already made a really fun casual Commander list for her, and shes also bounded her way into my Legacy Death & Taxes list
Either of the new decks work as an excellent starting point for newcomers, and while the emphasis is on beginners, there are plenty of solid cards included that even veterans may want to scoop them up
The second number is the number of cards in that set