To ensure youre using a card thats legal in the Standard format, look for cards with the F regulation mark or later printed on the bottom-left part of the card
Rounding out Gold, we have a red card
Update, September 7 12:55 PM BST: Its been confirmed that its not just Brazil thats getting it this week, as Press Start has received word that it will be available between September 9 and October 20 in Australia
//// The Grand Evolution Enchantment Saga (As this Saga enters and after your draw step, add a lore counter.) I Mill ten cards
Could still be good, it just doesn't make me super excited to play, which is where I think you want the custom cards to be
Sacrifice after III.) I Create a 2/2 blue Shapeshifter creature token with changeling