In other TCG-related news, check out the Snorlax card from Pokmon GO [S10b]
7 Summon Limit If you hate decks summoning a bunch of Monsters in one turn, then Summon Limit is the card for you
The API is written in Ruby on Rails, while the data is all stored in PostgreSQL
Decks vary how many copies they play based on how reliably they want to have a copy once they hit seven mana, which is usually a question of how often they need that boost to win the game combined with how much they need to sacrifice to make sure they get that far
Now, most decks play some ramp, a Sol Ring here, an Arcane Signet there
If your EDH decks need a little extra card draw, what not put it in the command zone so you have access to it every game