Aerith, Last Ancient Lifegain decks are always on the hunt for payoffs that make gaining life worthwhile since doing so doesnt impact the board
In Lorcana, exert is used in lots of ways: You exert ink when you use it to pay a cards ink cost You exert characters when you quest , challenge , or sing Some items get exerted as a cost when they are used Some cards or characters have abilities that require them to be exerted to use them Certain actions and abilities can exert other players cards When a card is exerted, they cant take any other actions unless they are readied by an effect
Unlike most mana dorks, you can use Wall of Roots the turn it comes into play and use it on your opponents' turns and still block with it since it doesn't tap for mana
It remains a force of Black nature at the kitchen table where Commander and other decks use it, and it's one of the top lands ever printed
Onto the cards
they are completely different people who just happen to be named Cid, and happen to be a machinist or technologist of some kind