Lex Adventuring Profiteer

First Strike
When Lex enters the battlefield and whenever you venture into the dungeon create a tapped Treasure token.
As long as you've completed a dungeon whenever one or more Treasures would be created under your control, Those Treasures plus an additional one are created under your control.

If you would lose the game while you have one or more treasures instead sacrifice all treasures then set your life total to the amount of treasures sacrificed this way.
{t}Discard a card, then create three t