The store credit bonus is based on the entire order and not per individual card
So far in 2020, we've been averaging about one per month (and if you go back to the initial release in December, we've actually had 13 individual drops in three months, making the average closer to four drops per month since the series was announced), although the average is somewhat complicated by how you count themes that come with multiple drops, like the original Theros Gods during Worlds in February (technically, the Gods were five individual but related drops, although there is an argument for counting them as one big drop since buying all of the drops together was an option)
Can Sakazuki clean your board if you put that much pressure each turn
1 20 of 61 cards where the text includes extra turn Magosi, the Waterveil Land This land enters tapped
Its about how many people want it
Serialized Golden Chocobo and Colorful Chocobo Cards Digital render