Lorcana features a Shift mechanic which allows you to pay a reduced price to replace the card facing with another of the same character, which is a cost-effective way of swapping out versions mid-game
Humans because there are simply so many of them, especially in white, where you can run multiple Champion of the Parish without watering down the card quality in the rest of the color
With the loss of Voltaic Key and Tolarian Academy, the Monolith went on to just be an amazing card that powered a lot of different artifact decks over the next few years
Triggered abilities use the words "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keyword abilities (such as prowess) are triggered abilities and will have "when," "whenever," or "at the beginning of" in their reminder text
Sure, its a steep mana sink at , but that more than makes up for its 6/6 Swampwalkin body
But at a high cost he could be clunky and an obvious play at eight ink