The Conspiracy card is, naturally, redesigned to resemble the shadowy order of Templars - the chief antagonists of the AC series
For damage counter dice, a handful of standard six-sided dice will do, with each pip representing 10 damage
Sliver Gravemother All for one, one for all The Legend rule is the thing that stops you from copying your legendary creatures willy-nilly, because you can only have one in play at any given time
Historic Historic is a term that refers to artifacts, Sagas, and anything with the legendary supertype, all of which you'll find in abundance in this set
Theres something cool about generating large black Zombie Warrior tokens in a mono-white deck, but practically speaking, its nice to be able to diversify your colors in case a creature attacking you has protection from white (granted by Sword of Hearth and Home, for instance)
The cost is cheap and flexible