For Clerics and Rogues, however, this seems like a very nice option indeed
If a card was played in a tournament more frequently, the cost of the card would be higher, in addition to the market availability of the card
Large card printers like Cartamundi buy that stock and keep it in their plants
"[Type]cycling [cost]" means "[Cost], Discard this card: Search your library for a [type] card, reveal it, put it into your hand, then shuffle." This type is usually a subtype (as in "Mountaincycling") but can be any card type, subtype, supertype, or combination thereof (as in "basic landcycling")
Below is a photo of the draft archetypes from an Adventures in the Forgotten Realms draft booster I opened
Mewtwo is a Pure Psychic type, and it is widely considered the most powerful Pokmon in the original 151 by every statistical measure