Ex cards are generally the rarest, and prohibitively expensive to craft for a F2P player
For split cards, the combined mana cost of the two halves determines its discover cost
Every green creature above three mana is tough enough to work with, so you can just chuck Catapult Fodder into a pile of miscellaneous creatures and removal as an alternative closer
Though, in Genshin Impact at least, players are guaranteed to get the featured 5-star character on pull 180
Its very nice to planeswalk to Tazeem if you already have good creatures, but if youre behind on board, get away from it as soon as possible because you wont get any benefits
Suplex (great) Three damage for 2 mana is a strong rate, and Suplex also exiles and acts as a Shatter if needed