Her ability is twofold, she exiles cards from your opponents library when your Elves or Faeries enter the battlefield, and then she lets you cast spells from that exiled pile for free if you have enough Elves/Faeries to match the mana value
Others update daily, weekly, or on some schedule that isn't always clear
You'll understand what Blue/Yellow wants to do faster with Nami than with any other leader in the pair
Pokmon-EX rule: When a Pokmon- EX has been Knocked Out, your opponent takes 2 Prize cards
As far as self mill goes, I really like Cemetery Tampering
4- Red Monkey.D.Dragon 4xEB01-003 4xOP01-024 4xOP02-015 4xOP04-016 4xOP05-004 4xOP05-005 4xOP05-006 2xOP05-010 4xOP05-015 4xOP05-017 2xOP06-002 4xOP06-003 1xOP07-001 4xOP07-015 2xST01-012 The OP07 Monkey.D.Dragon Leader is an option if youre looking for a deck on the low end