You can discard your hand and draw that many cards plus one, make some creatures to swing immediately, or X a creature and take it down
When a creature connives, its controller draws a card, discards a card, then puts a +1/+1 counter on that creature if the discarded card was a nonland card
They trade and allow you to sell your cards as well at a fair price and trade
It's both the best since Treasures are superior to ramp right now and double able with Doubling Season and the worst since it's an answerable dork and in black so harder to play in Commander due to color identity
GODEEPER: Understanding how Life cards work as a resource is foundational to playing Nami correctly
Special Summon this card from the Graveyard during your next Standby Phase, and if you do, it gains 1 Level