Activate Will Kenrith's -2 ability targeting yourself, reducing the cost of your instant, sorcery, and planeswalker spells by 2 until end of turn and drawing you 2 cards.
Activate Paradise Plume by tapping it, adding .
Cast Ghostly Flicker by paying , targeting Paradise Plume and Nucklavee, blinking them as well as triggering Paradise Plume to gain you 1 life.
When Nucklavee enters the battlefield, return Ghostly Flicker to you hand.
When Paradise Plume enters the battlefield, choose "blue".
Repeat.
This loop relies on Will Kenrith’s planeswalker ability to permanently discount your spells by {2}, allowing Ghostly Flicker to be cast for a single blue mana. When you cast it, you target both Paradise Plume (choosing blue) and Nucklavee. As Nucklavee enters the battlefield, its triggered ability retrieves Ghostly Flicker straight back to your hand, while Paradise Plume's mana ability and life-gaining trigger provide both the fuel to sustain the loop and infinite life along the way.